小学一年级数学口算练习题

小学数学口算练习题 2+18= 18-6= 16-1= 2+12= 5+11= 17-7= 5+1= 10-1= 12+5= 11-2= 15+1= 19-11= 10+9= 16-7= 2+15= 16-15= 15+3= 9-4= 20-1= 11-10= 6+8= 2+5= 2+6= 10+1= 17-16= 13+4= 20-1= 1+2= 20-3= 2+7= 19-6= 15-12= 9+1= 14-1= 5+2= 13+7= 19-4= 3+5= 17+3= 3+8= 8+4= 17+3= 17+3= 4+12= 14+3= 1+14= 1+5= 3+14= 13-3= 10+2= 9-8= 12-8= 2+5= 19-18= 14+3= 17-3= 9-4= 6+13= 13+5= 3+7= 12+3= 5+6= 17-1= 5+2= 7+7= 6+7= 12-11= 20-13= 13+6= 15-5= 20-1= 5+8= 18-12= 7+1=20-6= 8+6= 3+13= 1+19= 17-16= 7+13= 10-2= 11+6= 1+8= 14+2= 9+5= 2+10= 1+12= 8+12= 11-10= 3+3= 3+17= 8+4= 8+2= 2-1= 1+4= 9+9= 8+7= 20-18= 19-5= 5+6= 20-3= 17-10= 1+16= 9+1= 9+10= 10-2= 18-17= 6+14= 18-8= 9+6= 8-6= 7-5= 13+2= 19-12= 1 11+9= 17-12= 16-4= 13-1= 16-8= 2+12= 2+8= 15-8= 19-16= 19-4= 14+3= 3+4= 19-17= 5-1= 15+5= 20-1= 19-10= 7-1= 6-3= 6+13= 11-3= 11+7= 10+4= 20-15= 17-7= 7-6= 19-16= 14+3= 5+8= 20-19= 5+13= 1+8= 9+7= 13-2= 9-1= 17-9= 6-1= 18-4= 14-13= 10-1= 15-2= 12-2= 3+5= 9+5= 13-1= 18-13= 12+8= 11+7= 6+7= 15-5= 16-5= 12-1= 4+5= 13+4= -2= 7-2= 5+3= 4+12= 15+5= 12+1= 5 3+7= 14-6= 7+8= 3+6= 16-6= 19-16= 20-9= 11-9= 13-7= 4+11= 1+18= 19-18= 7+13= 1+7= 13+2= 17-8= 17-7= 2+5= 3-2= 7+10= 16-10= 5+6= 11-10= 18-16= 14-2= 18-2= 11+7= 7+12= 9-1= 10-8= 20-15= 10-9= 20-8= 20-11= 20-5= 20-18= 14+2= 14-10= 6+11= 12+7= 12-10= 14+5= 18-4= 9+8= 6+3= 16-4= 18-12= 1+17= 14+2= 4+4= 10-2= 14-6= 12-6= 12+6= 11-3= 15+2= 5+13= 9+6= 2+1= 16-14= 2 1+8= 4+12= 3+13= 14-3= 18-5= 7+6= 12+1= 12-1= 19-15= 18-1= 13-11= 16+1= 9-2= 16-7= 16-15= 18-14= 18-5= 16+4= 20-16= 17-5= 20-19= 10-5= 11-4= 1+8= 16-11= 17-5= 6+2= 6+10= 14-9= 18-11= 2+13= 6+8= 13-12= 13-3= 8+5= 19-4= 19-18= 7-4= 6+13= 17-3= 1+17= 20-6= 7-2= 5-2= 7+3= 14-2= 15+4= 14-8= -6= 11-2=2 0-15= 6+2= 11-8= 9-4= 17 16-6= 14+1= 2+5= 2+17= 2+10= 8+12= 14+3= 8-2= 17+1= 20-5= 18-13= 11-9= 18-15= 15-9= 1+8= 19-14= 10+5= 19-12= 20-13= 12-9= 18-6= 14-8= 7+8= 18-14= 11-8= 8-7= 17+3= 1+3= 7-4= 2+5= 5-2= 14-3= 8+9= 13-1= 9+3= 7+12= 17-3= 20-19= 5-1= 20-15= 19-18= 12+2= 15-5= 12-3= 6+4= 7+5= 19-8= 18-11= 19-13= 8+9= 10-4= 2+3= 3+1= 4+10= 7+6= 8+9= 3+15= 12-3= 1+18= 19-12= 15-1= 11+2= 7+4= 15-5= 9-3= 19-9= 3 17+2= 6+12= 10+1= 9+7= 11-5= 15-1= 1+5= 14+5= 2+11= 4+4= 6-1= 4+15= 2+10= 17-3= 15+2= 6-5= 7+10= 18+2= 5+4= 4+7= 2+14= 6+1= 13-4= 10-9= 19-11= 14+6= 2+18= 16-8= 10-8= 1+12= 8+4= 13+3= 4-1= 1+9= 14-5= 8+1= 4+4= 7+2= 16-2= 3+11= 14-13= 16+4= 19-11= 6+4= 10+9= 1+17= 12+6= 18-5= -11= 6-5= 3+16= 3+10= 10-1= 1+6= 17 17-14= 14+1= 20-1= 10-2= 18-7= 7+10= 9-7= 19-10= 20-4= 6+6= 15-10= 8+11= 14-3= 4+9= 19-1= 16+2= 18-7= 20-13= 14-1= 3+4= 14-5= 2+14= 16-2= 17-2= 6+8= 7+8= 6+3= 8-1= 20-13= 4-2= 20-16= 6+5= 17-13= 5+12= 5+2= 14+1= 5+6= 11-6= 9-2= 4+11= 5+8= 10+9= 5+2= 18-17= 13-1= 3+11= 4+14= 13-2= 13-6= 13-5= 2+4= 8+7= 11+2= 5+3= 4+4= 15-10= 10-9= 6-2= 5+10= 15-4= 14-2= 5+8= 9+6= 2+18= 4-3= 8-2= 4 5+2= 14-11= 14+2= 4+12= 4+12= 1+2= 5+9= 1+19= 20-7= 20-1= 9-8= 5+10= 19-15= 7+1= 19-14= 14-5= 6+14= 4+16= 10-2= 7-1= 10-3= 19-18= 6-3= 7+5= 14+6= 7+4= 5+10= 17-15= 4+15= 14-4= 14-10= 16-13= 15-2= 1+17= 13-1= 4+5= 3+15= 5+2= 9-2= 9-1= 16-14= 10-5= 12+8= 2+1= 1+8= 14-7= 9+11= -4= 20-14= 14+6= 13+4= 12-7= 3+4= 19 10+7= 14+5= 9+5= 12+4= 5+9= 14-6= 15+2= 9+4= 7+9= 20-4= 14-3= 4+6= 20-5= 12-9= 6+2= 17+3= 19-6= 2+14= 20-8= 4+10= 7+2= 9-5= 20-14= 17-3= 5+6= 1+2= 4+12= 3+1= 9+7= 12-5= 3+11= 1+8= 4+12= 6-3= 14-13= 9+6= 17-3= 10+3= 19-11= 19-1= 10-7= 20-4= 10+2= 7+12= 15-11= 16-12= 8+3= 18-16= 3+15= 19-15= 9+7= 11-10= 13-2= 15-11= 17+1= 14-8= 1+18= 9+2= 1+14= 17-7= 5 18-17= 2-1= 5+12= 14-6= 17-12= 5+9= 12+4= 7+1= 10-5= 6+12= 18-15= 9+3= 11-9= 7+12= 12+5= 9+2= 4+14= 20-8= 5+10= 14-11= 16-7= 7+1= 2+6= 11-9= 13-2= 14-6= 14+3= 19-8= 18-8= 3+8= 14-1= 16+2= 17+2= 20-17= 7+13= 7-6= 15-9= 10+10= 18-15= 6-2= 3+14= 18-11= 2+3= 15-13= 19-16= 13-8= 5+9= 19-10= 11-2= 3-2= 6-1= 10-8= 16-14= 11-10= 5+1= 15-3= 20-10= 17-5= 6+13= 2+7= -3= 5+5= 3+11= 3+13= 17-11= 17-1= 14 18-6= 19-2= 15+3= 15-6= 14-8= 14-9= 9+8= 18+2= 1+7= 16-7= 9+7= 3+11= 3+10= 12+8= 11+1= 20-7= 1+6= 15+3= 10-6= 11+4= 7+8= 14+2= 10+9= 2+14= 15-6= 12-7= 1+17, 3+17= 10+5= 6+3= 14-7= 18-17= 4+11= 5-1= 16-13= 13+4= 19-11= 1+10= 6+8= 13+3= 4+1= 9+8= 17-7= 20-4= 2+5= 2+13= 18-3= 20-19= 2+17= 5+4= 1+6= 16-4= 9+11= 5-2= 6 17-15= 12+1= 6+7= 14-8= 13-11= 12-8= 10-4= 5+4= 11+8= 15-1= 7+10= 15-3= 16-1= 11-1= 11+4= 16-5= 7+1= 13-9= 12+5= 7+10= 9-3= 7+10= 3+4= 20-18= 3+7= 18-10= 14-10= 20-1= 18-2= 1+7= 2+13= 13+2= 6+3= 1+17= 1+14= 19-1= 6+9= 6-2= 12-2= 1+13= 6-5= 19-16= 2+15= 2+10= 8+8= 9+5= 5+2= 10+9= 17-7= 9+11= 15-2= 15-5= 16-15= 8-1= 6+13= 12+7= 3+14= 3+5= 9+6= 19-6= 2+18= 20-14= 3+11= 15-9= 10+8= 4+5= 4+12= 16-11= 14-13= 14+2= 17-5= 14-9= 8+12= 18-1= 13+1= 19-12= 13-10= 8-1= 11+1= 19-4= 16-4= 12+4= 3+5= 15+1= 16-4= 3+2= 12-10= 17-1= 18-10= 15-8= 1+2= 1+15= 3+3= 7+9= 8-3= 10+10= 13-9= 14+5= 20-17= 10-2= 11-4= 2+17= 6+10= 13+7= 6+5= 13-8= 15+3= 11-6= 16-2= 17-11= 7+12= 6+13= 14-11= 8+3= 7 2+18= 18-6= 16-1= 2+12= 5+11= 17-7= 5+1= 10-1= 12+5= 11-2= 15+1= 19-11= 10+9= 16-7= 2+15= 16-15= 15+3= 9-4= 20-1= 11-10= 6+8= 2+5= 2+6= 10+1= 17-16= 13+4= 20-1= 1+2= 20-3= 2+7= 19-6= 15-12= 9+1= 14-1= 5+2= 13+7= 19-4= 3+5= 17+3= 3+8= 8+4= 17+3= 17+3= 4+12= 14+3= 1+14= 1+5= 3+14= 13-3= 10+2= 9-8= 12-8= 2+5= 19-18= 14+3= 17-3= 9-4= 6+13= 13+5= 3+7= -1= 5+2= 7+7= 6+7= 12+3= 5+6= 17 12-11= 20-13= 13+6= 15-5= 20-1= 5+8= 18-12= 7+1=20-6= 8+6= 3+13= 1+19= 17-16= 7+13= 10-2= 11+6= 1+8= 14+2= 9+5= 2+10= 1+12= 8+12= 11-10= 3+3= 3+17= 8+4= 8+2= 2-1= 1+4= 9+9= 8+7= 20-18= 19-5= 5+6= 20-3= 17-10= 1+16= 9+1= 9+10= 10-2= 18-17= 6+14= 18-8= 9+6= 8-6= 7-5= 13+2= 19-12= 11+9= 17-12= 16-4= 13-1= 16-8= 2+12= 8 2+8= 15-8= 19-16= 19-4= 14+3= 3+4= 19-17= 5-1= 15+5= 20-1= 19-10= 7-1= 6-3= 6+13= 11-3= 11+7= 10+4= 20-15= 17-7= 7-6= 19-16= 14+3= 5+8= 20-19= 5+13= 1+8= 9+7= 13-2= 9-1= 17-9= 6-1= 18-4= 14-13= 10-1= 15-2= 12-2= 3+5= 9+5= 13-1= 18-13= 12+8= 11+7= 6+7= 15-5= 16-5= 12-1= 4+5= 13+4= 5-2= 7-2= 5+3= 4+12= 15+5= 12+1= 3+7= 14-6= 7+8= 3+6= 16-6= 19-16= -9= 11-9= 13-7= 4+11= 1+18= 19-18= 20 7+13= 1+7= 13+2= 17-8= 17-7= 2+5= 3-2= 7+10= 16-10= 5+6= 11-10= 18-16= 14-2= 18-2= 11+7= 7+12= 9-1= 10-8= 20-15= 10-9= 20-8= 20-11= 20-5= 20-18= 14+2= 14-10= 6+11= 12+7= 12-10= 14+5= 18-4= 9+8= 6+3= 16-4= 18-12= 1+17= 14+2= 4+4= 10-2= 14-6= 12-6= 12+6= 11-3= 15+2= 5+13= 9+6= 2+1= 16-14= 9 1+8= 4+12= 3+13= 14-3= 18-5= 7+6= 12+1= 12-1= 19-15= 18-1= 13-11= 16+1= 9-2= 16-7= 16-15= 18-14= 18-5= 16+4= 20-16= 17-5= 20-19= 10-5= 11-4= 1+8= 16-11= 17-5= 6+2= 6+10= 14-9= 18-11= 2+13= 6+8= 13-12= 13-3= 8+5= 19-4= 19-18= 7-4= 6+13= 17-3= 1+17= 20-6= 7-2= 5-2= 7+3= 14-2= 15+4= 14-8= 17-6= 11-2=2 0-15= 6+2= 11-8= 9-4= 16-6= 14+1= 2+5= 2+17= 2+10= 8+12= -2= 17+1= 20-5= 18-13= 11-9= 14+3= 8 18-15= 15-9= 1+8= 19-14= 10+5= 19-12= 20-13= 12-9= 18-6= 14-8= 7+8= 18-14= 11-8= 8-7= 17+3= 1+3= 7-4= 2+5= 5-2= 14-3= 8+9= 13-1= 9+3= 7+12= 17-3= 20-19= 5-1= 20-15= 19-18= 12+2= 15-5= 12-3= 6+4= 7+5= 19-8= 18-11= 19-13= 8+9= 10-4= 2+3= 3+1= 4+10= 7+6= 8+9= 3+15= 12-3= 1+18= 19-12= 15-1= 11+2= 7+4= 15-5= 9-3= 19-9= 10 2+18= 18-6= 16-1= 2+12= 5+11= 17-7= 5+1= 10-1= 12+5= 11-2= 15+1= 19-11= 10+9= 16-7= 2+15= 16-15= 15+3= 9-4= 20-1= 11-10= 6+8= 2+5= 2+6= 10+1= 17-16= 13+4= 20-1= 1+2= 20-3= 2+7= 19-6= 15-12= 9+1= 14-1= 5+2= 13+7= 19-4= 3+5= 17+3= 3+8= 8+4= 17+3= 17+3= 4+12= 14+3= 1+14= 1+5= 3+14= 13-3= 10+2= 9-8= 12-8= 2+5= 19-18= 14+3= 17-3= 9-4= 6+13= 13+5= 3+7= -1= 5+2= 7+7= 6+7= 12+3= 5+6= 17 12-11= 20-13= 13+6= 15-5= 20-1= 5+8= 18-12= 7+1=20-6= 8+6= 3+13= 1+19= 17-16= 7+13= 10-2= 11+6= 1+8= 14+2= 9+5= 2+10= 1+12= 8+12= 11-10= 3+3= 3+17= 8+4= 8+2= 2-1= 1+4= 9+9= 8+7= 20-18= 19-5= 5+6= 20-3= 17-10= 1+16= 9+1= 9+10= 10-2= 18-17= 6+14= 18-8= 9+6= 8-6= 7-5= 13+2= 19-12= 11+9= 17-12= 16-4= 13-1= 16-8= 2+12= 11 2+8= 15-8= 19-16= 19-4= 14+3= 3+4= 19-17= 5-1= 15+5= 20-1= 19-10= 7-1= 6-3= 6+13= 11-3= 11+7= 10+4= 20-15= 17-7= 7-6= 19-16= 14+3= 5+8= 20-19= 5+13= 1+8= 9+7= 13-2= 9-1= 17-9= 6-1= 18-4= 14-13= 10-1= 15-2= 12-2= 3+5= 9+5= 13-1= 18-13= 12+8= 11+7= 6+7= 15-5= 16-5= 12-1= 4+5= 13+4= 5-2= 7-2= 5+3= 4+12= 15+5= 12+1= 3+7= 14-6= 7+8= 3+6= 16-6= 19-16= -9= 11-9= 13-7= 4+11= 1+18= 19-18= 20 7+13= 1+7= 13+2= 17-8= 17-7= 2+5= 3-2= 7+10= 16-10= 5+6= 11-10= 18-16= 14-2= 18-2= 11+7= 7+12= 9-1= 10-8= 20-15= 10-9= 20-8= 20-11= 20-5= 20-18= 14+2= 14-10= 6+11= 12+7= 12-10= 14+5= 18-4= 9+8= 6+3= 16-4= 18-12= 1+17= 14+2= 4+4= 10-2= 14-6= 12-6= 12+6= 11-3= 15+2= 5+13= 9+6= 2+1= 16-14= 12 1+8= 4+12= 3+13= 14-3= 18-5= 7+6= 12+1= 12-1= 19-15= 18-1= 13-11= 16+1= 9-2= 16-7= 16-15= 18-14= 18-5= 16+4= 20-16= 17-5= 20-19= 10-5= 11-4= 1+8= 16-11= 17-5= 6+2= 6+10= 14-9= 18-11= 2+13= 6+8= 13-12= 13-3= 8+5= 19-4= 19-18= 7-4= 6+13= 17-3= 1+17= 20-6= 7-2= 5-2= 7+3= 14-2= 15+4= 14-8= 17-6= 11-2=2 0-15= 6+2= 11-8= 9-4= 16-6= 14+1= 2+5= 2+17= 2+10= 8+12= -2= 17+1= 20-5= 18-13= 11-9= 14+3= 8 18-15= 15-9= 1+8= 19-14= 10+5= 19-12= 20-13= 12-9= 18-6= 14-8= 7+8= 18-14= 11-8= 8-7= 17+3= 1+3= 7-4= 2+5= 5-2= 14-3= 8+9= 13-1= 9+3= 7+12= 17-3= 20-19= 5-1= 20-15= 19-18= 12+2= 15-5= 12-3= 6+4= 7+5= 19-8= 18-11= 19-13= 8+9= 10-4= 2+3= 3+1= 4+10= 7+6= 8+9= 3+15= 12-3= 1+18= 19-12= 15-1= 11+2= 7+4= 15-5= 9-3= 19-9= 13 17+2= 6+12= 10+1= 9+7= 11-5= 15-1= 1+5= 14+5= 2+11= 4+4= 6-1= 4+15= 2+10= 17-3= 15+2= 6-5= 7+10= 18+2= 5+4= 4+7= 2+14= 6+1= 13-4= 10-9= 19-11= 14+6= 2+18= 16-8= 10-8= 1+12= 8+4= 13+3= 4-1= 1+9= 14-5= 8+1= 4+4= 7+2= 16-2= 3+11= 14-13= 16+4= 19-11= 6+4= 10+9= 1+17= 12+6= 18-5= 17-11= 6-5= 3+16= 3+10= 10-1= 1+6= 17-14= 14+1= 20-1= 10-2= 18-7= 7+10= -7= 19-10= 20-4= 6+6= 15-10= 8+11= 9 14-3= 4+9= 19-1= 16+2= 18-7= 20-13= 14-1= 3+4= 14-5= 2+14= 16-2= 17-2= 6+8= 7+8= 6+3= 8-1= 20-13= 4-2= 20-16= 6+5= 17-13= 5+12= 5+2= 14+1= 5+6= 11-6= 9-2= 4+11= 5+8= 10+9= 5+2= 18-17= 13-1= 3+11= 4+14= 13-2= 13-6= 13-5= 2+4= 8+7= 11+2= 5+3= 4+4= 15-10= 10-9= 6-2= 5+10= 15-4= 14-2= 5+8= 9+6= 2+18= 4-3= 8-2= 14 5+2= 14-11= 14+2= 4+12= 4+12= 1+2= 5+9= 1+19= 20-7= 20-1= 9-8= 5+10= 19-15= 7+1= 19-14= 14-5= 6+14= 4+16= 10-2= 7-1= 10-3= 19-18= 6-3= 7+5= 14+6= 7+4= 5+10= 17-15= 4+15= 14-4= 14-10= 16-13= 15-2= 1+17= 13-1= 4+5= 3+15= 5+2= 9-2= 9-1= 16-14= 10-5= 12+8= 2+1= 1+8= 14-7= 9+11= 3+4= 19-4= 20-14= 14+6= 13+4= 12-7= 10+7= 14+5= 9+5= 12+4= 5+9= 14-6= -4= 14-3= 4+6= 15+2= 9+4= 7+9= 20 20-5= 12-9= 6+2= 17+3= 19-6= 2+14= 20-8= 4+10= 7+2= 9-5= 20-14= 17-3= 5+6= 1+2= 4+12= 3+1= 9+7= 12-5= 3+11= 1+8= 4+12= 6-3= 14-13= 9+6= 17-3= 10+3= 19-11= 19-1= 10-7= 20-4= 10+2= 7+12= 15-11= 16-12= 8+3= 18-16= 3+15= 19-15= 9+7= 11-10= 13-2= 15-11= 17+1= 14-8= 1+18= 9+2= 1+14= 17-7= 15 18-17= 2-1= 5+12= 14-6= 17-12= 5+9= 12+4= 7+1= 10-5= 6+12= 18-15= 9+3= 11-9= 7+12= 12+5= 9+2= 4+14= 20-8= 5+10= 14-11= 16-7= 7+1= 2+6= 11-9= 13-2= 14-6= 14+3= 19-8= 18-8= 3+8= 14-1= 16+2= 17+2= 20-17= 7+13= 7-6= 15-9= 10+10= 18-15= 6-2= 3+14= 18-11= 2+3= 15-13= 19-16= 13-8= 5+9= 19-10= 11-2= 3-2= 6-1= 10-8= 16-14= 11-10= -3= 20-10= 17-5= 6+13= 2+7= 5+1= 15 14-3= 5+5= 3+11= 3+13= 17-11= 17-1= 18-6= 19-2= 15+3= 15-6= 14-8= 14-9= 9+8= 18+2= 1+7= 16-7= 9+7= 3+11= 3+10= 12+8= 11+1= 20-7= 1+6= 15+3= 10-6= 11+4= 7+8= 14+2= 10+9= 2+14= 15-6= 12-7= 1+17, 3+17= 10+5= 6+3= 14-7= 18-17= 4+11= 5-1= 16-13= 13+4= 19-11= 1+10= 6+8= 13+3= 4+1= 9+8= 17-7= 20-4= 2+5= 2+13= 18-3= 20-19= 2+17= 5+4= 1+6= 16-4= 9+11= 5-2= 16 17-15= 12+1= 6+7= 14-8= 13-11= 12-8= 10-4= 5+4= 11+8= 15-1= 7+10= 15-3= 16-1= 11-1= 11+4= 16-5= 7+1= 13-9= 12+5= 7+10= 9-3= 7+10= 3+4= 20-18= 3+7= 18-10= 14-10= 20-1= 18-2= 1+7= 2+13= 13+2= 6+3= 1+17= 1+14= 19-1= 6+9= 6-2= 12-2= 1+13= 6-5= 19-16= 2+15= 2+10= 8+8= 9+5= 5+2= 10+9= 17-7= 9+11= 15-2= 15-5= 16-15= 8-1= 6+13= 12+7= 3+14= 3+5= 9+6= 19-6= 2+18= 20-14= 3+11= 15-9= 10+8= 4+5= 4+12= 16-11= 14-13= 14+2= 17-5= 14-9= 8+12= 18-1= 13+1= 19-12= 13-10= 8-1= 11+1= 19-4= 16-4= 12+4= 3+5= 15+1= 16-4= 3+2= 12-10= 17-1= 18-10= 15-8= 1+2= 1+15= 3+3= 7+9= 8-3= 10+10= 13-9= 14+5= 20-17= 10-2= 11-4= 2+17= 6+10= 13+7= 6+5= 13-8= 15+3= 11-6= 16-2= 17-11= 7+12= 6+13= 14-11= 8+3= 2+18= 18-6= 16-1= 2+12= 5+11= 17-7= 17 5+1= 10-1= 12+5= 11-2= 15+1= 19-11= 10+9= 16-7= 2+15= 16-15= 15+3= 9-4= 20-1= 11-10= 6+8= 2+5= 2+6= 10+1= 17-16= 13+4= 20-1= 1+2= 20-3= 2+7= 19-6= 15-12= 9+1= 14-1= 5+2= 13+7= 19-4= 3+5= 17+3= 3+8= 8+4= 17+3= 17+3= 4+12= 14+3= 1+14= 1+5= 3+14= 13-3= 10+2= 9-8= 12-8= 2+5= 19-18= -4= 6+13= 13+5= 3+7= 14+3= 17-3= 9 12+3= 5+6= 17-1= 5+2= 7+7= 6+7= 12-11= 20-13= 13+6= 15-5= 20-1= 5+8= 18-12= 7+1=20-6= 8+6= 3+13= 1+19= 17-16= 7+13= 10-2= 11+6= 1+8= 14+2= 9+5= 2+10= 1+12= 8+12= 11-10= 3+3= 3+17= 8+4= 8+2= 2-1= 1+4= 9+9= 8+7= 20-18= 19-5= 5+6= 20-3= 17-10= 1+16= 9+1= 9+10= 10-2= 18-17= 6+14= 18-8= 9+6= 8-6= 7-5= 13+2= 19-12= 11+9= 17-12= 16-4= 13-1= 16-8= 2+12= 18 2+8= 15-8= 19-16= 19-4= 14+3= 3+4= 19-17= 5-1= 15+5= 20-1= 19-10= 7-1= 6-3= 6+13= 11-3= 11+7= 10+4= 20-15= 17-7= 7-6= 19-16= 14+3= 5+8= 20-19= 5+13= 1+8= 9+7= 13-2= 9-1= 17-9= 6-1= 18-4= 14-13= 10-1= 15-2= 12-2= 3+5= 9+5= 13-1= 18-13= 12+8= 11+7= 6+7= 15-5= 16-5= 12-1= 4+5= 13+4= 5-2= 7-2= 5+3= 4+12= 15+5= 12+1= -6= 7+8= 3+6= 16-6= 19-16= 3+7= 14 20-9= 11-9= 13-7= 4+11= 1+18= 19-18= 7+13= 1+7= 13+2= 17-8= 17-7= 2+5= 3-2= 7+10= 16-10= 5+6= 11-10= 18-16= 14-2= 18-2= 11+7= 7+12= 9-1= 10-8= 20-15= 10-9= 20-8= 20-11= 20-5= 20-18= 14+2= 14-10= 6+11= 12+7= 12-10= 14+5= 18-4= 9+8= 6+3= 16-4= 18-12= 1+17= 14+2= 4+4= 10-2= 14-6= 12-6= 12+6= 11-3= 15+2= 5+13= 9+6= 2+1= 16-14= 1+8= 4+12= 3+13= 14-3= 18-5= 7+6= 19 12+1= 12-1= 19-15= 18-1= 13-11= 16+1= 9-2= 16-7= 16-15= 18-14= 18-5= 16+4= 20-16= 17-5= 20-19= 10-5= 11-4= 1+8= 16-11= 17-5= 6+2= 6+10= 14-9= 18-11= 2+13= 6+8= 13-12= 13-3= 8+5= 19-4= 19-18= 7-4= 6+13= 17-3= 1+17= 20-6= 7-2= 5-2= 7+3= 14-2= 15+4= 14-8= 17-6= 11-2=2 0-15= 6+2= 11-8= 9-4= -6= 14+1= 2+5= 2+17= 2+10= 8+12= 16 14+3= 8-2= 17+1= 20-5= 18-13= 11-9= 18-15= 15-9= 1+8= 19-14= 10+5= 19-12= 20-13= 12-9= 18-6= 14-8= 7+8= 18-14= 11-8= 8-7= 17+3= 1+3= 7-4= 2+5= 5-2= 14-3= 8+9= 13-1= 9+3= 7+12= 17-3= 20-19= 5-1= 20-15= 19-18= 12+2= 15-5= 12-3= 6+4= 7+5= 19-8= 18-11= 19-13= 8+9= 10-4= 2+3= 3+1= 4+10= 7+6= 8+9= 3+15= 12-3= 1+18= 19-12= 15-1= 11+2= 7+4= 15-5= 9-3= 19-9= 20 36，20, 37，7, 57,8, 80,68, 17，80, 9，30, 78,9, 48，26, 99,56, 75,35, 39，5, 28,13, 27，6, 54,8, 86，6, 24，39, 48,8, 72,58, 69,30, 90,4, 50,17, 20，58, 96,48, 55,7, 23，0, 67,9, 99,6, 50,26, 88,70, 19，40, 62,8, 79,35, 49，4, 42,4, 65,40, 89,30, 25，9, 34,8, 47,9, 61,2, 79,50, 7，33, 90,29, 4，60, 12，50, 26,13, 49，8, 43，38, 29，2, 44，7, 48，5, 17，45, 25，7, 47，24, 33,2, 25,8, 50,16, 97,30, 36,7, 92,8, 9，39, 18，6, 19，9, 15，7, 13，38, 18，10, 22，16, 38，7, 15，6, 14，52, 16,14, 17，81, 13，69, 11，16, 26，6, 12，7, 15，38, 23，17, 87,60, 24,16, 32，45, 16,14, 44,9, 33，8, 58,20, 62，17, 47,15, 54，14, 98,49, 14，76, 68,17, 73,16, 70,33, 34,10, 48,29, 72,43, 75,27, 75，14, 69，27, 90,38, 21 6-3= 6+13= 11-3= 11+7= 10+4= 20-15= 17-7= 7-6= 19-16= 14+3= 5+8= 20-19= 5+13= 1+8= 9+7= 13-2= 9-1= 17-9= 6-1= 18-4= 14-13= 10-1= 15-2= 12-2= 3+5= 9+5= 13-1= 18-13= 12+8= 11+7= 6+7= 15-5= 16-5= 12-1= 4+5= 13+4= 5-2= 7-2= 5+3= 4+12= 15+5= 12+1= 3+7= 14-6= 7+8= 3+6= 16-6= 19-16= 20-9= 11-9= 13-7= 4+11= 1+18= 19-18= 7+13= 1+7= 13+2= 17-8= 17-7= 2+5= -2= 7+10= 16-10= 5+6= 11-10= 18-16= 3 14-2= 18-2= 11+7= 7+12= 9-1= 10-8= 20-15= 10-9= 20-8= 20-11= 20-5= 20-18= 14+2= 14-10= 6+11= 12+7= 12-10= 14+5= 18-4= 9+8= 6+3= 16-4= 18-12= 1+17= 14+2= 4+4= 10-2= 14-6= 12-6= 12+6= 11-3= 15+2= 5+13= 9+6= 2+1= 16-14= 1+8= 4+12= 3+13= 14-3= 18-5= 7+6= 12+1= 12-1= 19-15= 18-1= 13-11= 16+1= 22 9-2= 16-7= 16-15= 18-14= 18-5= 16+4= 20-16= 17-5= 20-19= 10-5= 11-4= 1+8= 16-11= 17-5= 6+2= 6+10= 14-9= 18-11= 2+13= 6+8= 13-12= 13-3= 8+5= 19-4= 19-18= 7-4= 6+13= 17-3= 1+17= 20-6= 7-2= 5-2= 7+3= 14-2= 15+4= 14-8= 17-6= 11-2=2 0-15= 6+2= 11-8= 9-4= 16-6= 14+1= 2+5= 2+17= 2+10= 8+12= 14+3= 8-2= 17+1= 20-5= 18-13= 11-9= 18-15= 15-9= 1+8= 19-14= 10+5= 19-12= -13= 12-9= 18-6= 14-8= 7+8= 18-14= 20 11-8= 8-7= 17+3= 1+3= 7-4= 2+5= 5-2= 14-3= 8+9= 13-1= 9+3= 7+12= 17-3= 20-19= 5-1= 20-15= 19-18= 12+2= 15-5= 12-3= 6+4= 7+5= 19-8= 18-11= 19-13= 8+9= 10-4= 2+3= 3+1= 4+10= 7+6= 8+9= 3+15= 12-3= 1+18= 19-12= 15-1= 11+2= 7+4= 15-5= 9-3= 19-9= 17+2= 6+12= 10+1= 9+7= 11-5= 15-1= 1+5= 14+5= 2+11= 4+4= 6-1= 4+15= 23 2+10= 17-3= 15+2= 6-5= 7+10= 18+2= 5+4= 4+7= 2+14= 6+1= 13-4= 10-9= 19-11= 14+6= 2+18= 16-8= 10-8= 1+12= 8+4= 13+3= 4-1= 1+9= 14-5= 8+1= 4+4= 7+2= 16-2= 3+11= 14-13= 16+4= 19-11= 6+4= 10+9= 1+17= 12+6= 18-5= 17-11= 6-5= 3+16= 3+10= 10-1= 1+6= 17-14= 14+1= 20-1= 10-2= 18-7= 7+10= 9-7= 19-10= 20-4= 6+6= 15-10= 8+11= 14-3= 4+9= 19-1= 16+2= 18-7= 20-13= -1= 3+4= 14-5= 2+14= 16-2= 17-2= 14 6+8= 7+8= 6+3= 8-1= 20-13= 4-2= 20-16= 6+5= 17-13= 5+12= 5+2= 14+1= 5+6= 11-6= 9-2= 4+11= 5+8= 10+9= 5+2= 18-17= 13-1= 3+11= 4+14= 13-2= 13-6= 13-5= 2+4= 8+7= 11+2= 5+3= 4+4= 15-10= 10-9= 6-2= 5+10= 15-4= 4+3= 10+9= 3+1= 11-7= 2+18= 4+16= 20-7= 4-2= 11-4= 4+1= 15-13= 11-9= 14-6= 8+9= 10-7= 17-3= 19-11= 5+6= 24 10+10= 10+9= 2+13= 5+3= 3+12= 5+13= 15+3= 10-4= 11+4= 9+6= 9+9= 7+7= 17-4= 4+11= 6-1= 10+5= 9+6= 3+9= 8-1= 8+5= 7+10= 16-11= 3+11= 3+5= 4+3= 9-2= 8+11= 16-12= 1+11= 2+12= 19-5= 20-5= 20-8= 4-3= 7+2= 2+6= 11+5= 6+8= 7-3= 9+4= 1+19= 12-10= 1+6= 20-10= 16-9= 17-13= 14-13= 9+3= 12+7= 13+4= 16-11= 6+8= 20-9= 18-2= 3+8= 15-2= 10+6= 5+12= 17+3= 20-5= 87,69, 32，18, 27,8, 18,7, 12,9, 8，25, 31,5, 24，9, 16,8, 19,5, 9，14, 22,9, 19,8, 10,9, 14,1, 24,9, 12,10, 25,6, 19,8, 27,14, 35，7, 12，8, 14，6, 14,9, 15，6, 18，10, 19，9, 50,3= 60,23= 30，16= 35，16, 49，38, 50,21, 35,30, 28，8, 42，26, 40，10, 26，39, 22,6, 93,65, 39,24, 47,30, 44，37, 75，5, 34，62, 25 72,38, 0，30, 86,43, 53,6, 33，9, 24，67, 35,27, 60,33, 95,90, 34，8, 25，18, 44,20, 96，6, 47，35, 26，45, 100，0= 100,40= 38，14= 90,13= 91,9= 35,17= 33，25= 50，15= 24，45= 44,8= 90,40, 80,30, 50,21, 30,12, 34，19, 53,25, 34，37, 90,44, 55，9, 80,47, 90,79, 50，32, 27，50, 38，34, 67，25, 56，33, 68，23, 27，46, 93,76, 45,28, 74,35, 28，19, 33，37, 33，37, 84,35, 21，73, 44，48, 15，89, 28，46, 84,37, 73，8, 78,69, 76,49, 77,48, 29，18, 25，16, 13，76, 45，37, 45,37, 45，36, 89,30, 25，9, 34,8, 47,9, 61,2, 79,50, 7，33, 90,29, 4，60, 12，50, 26,13, 49，8, 43，38, 29，2, 44，7, 48，5, 17，45, 25，7, 47，24, 33,2, 25,8, 50,16, 97,30, 36,7, 92,8, 9，39, 18，6, 19，9, 15，7, 13，38, 26 56，33, 68，23, 27，46, 93,76, 45,28, 56，33, 68，23, 27，46, 93,76, 45,28, 74,35, 28，19, 33，37, 33，37, 84,35, 21，73, 44，48, 15，89, 28，46, 84,37, 73，8, 78,69, 76,49, 77,48, 29，18, 25，16, 13，76, 45，37, 45,37, 45，36, 89,30, 25，9, 34,8, 47,9, 61,2, 79,50, 7，33, 90,29, 4，60, 12，50, 26,13, 49，8, 43，38, 29，2, 44，7, 48，5, 17，45, 25，7, 47，24, 33,2, 25,8, 50,16, 97,30, 36,7, 92,8, 9，39, 18，6, 19，9, 15，7, 13，38, 56，33, 68，23, 27，46, 93,76, 45,28, 74,35, 28，19, 33，37, 33，37, 84,35, 18，7,9, 15，4，6, 17，6,5, 47,8,3, 80,20，30, 100,20,40, 90,50,20, 87,17,50, 86,17,50, 98,9,70, 79,8,40, 43，13，43, 52，22，8, 33，5，34, 48,9，44, 76,7，20, 35，37,5, 44,8，50, 94,9,60, 15,7，4, 48,18，5, 8，33,5, 24，24，9, 42,4,20, 27 83,25，7, 63，17，6, 15，8，70, 15,8，4, 48,19，8, 6，39,5, 24，25，19, 42,24,10, 74,35, 28，19, 33，37, 33，37, 84,35, 18，7,9, 15，4，6, 17，6,5, 47,8,3, 80,20，30, 100,20,40, 90,50,20, 87,17,50, 86,17,50, 98,9,70, 79,8,40, 43，13，43, 52，22，8, 33，5，34, 48,9，44, 76,7，20, 35，37,5, 44,8，50, 94,9,60, 15,7，4, 48,18，5, 8，33,5, 24，24，9, 42,4,20, 83,25，7, 63，17，6, 15，8，70, 15,8，4, 48,19，8, 6，39,5, 24，25，19, 42,24,10, 17+2= 6+12= 10+1= 9+7= 11-5= 15-1= 1+5= 14+5= 2+11= 4+4= 6-1= 4+15= 2+10= 17-3= 15+2= 6-5= 7+10= 18+2= 5+4= 4+7= 2+14= 6+1= 13-4= 10-9= 19-11= 14+6= 2+18= 16-8= 10-8= 1+12= 8+4= 13+3= 4-1= 1+9= 14-5= 8+1= 4+4= 7+2= 16-2= 3+11= 14-13= 16+4= 28