[宝典]四年级数学简便
计算题
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四年级数学简便计算题及答案
1)125 ×(17 × 8)× 4 2)375 × 480 + 6250 × 48
3)25 × 16 ×125 4)13 × 99
5)75000 ? 125 ? 15 6)7900 ? 4 ? 25
7)150 × 40 ? 50 8)5600 ?(25 × 7)
9)210 ? 42 × 6 10)39600 ? 25
11)67 × 21 ,18 × 21 + 85 × 79 12)321 × 81 + 321 × 19
13)222222 × 999999 14)333333 × 333333
15)56000 ? (14000 ? 16) 16)654321 × 909090 +654321 × 90909
17)34 × 3535 ,35 × 3434 18)27000 ? 125
19)345345 ? 15015 20)347 + 358 + 352 + 349
21)75 × 45 + 17 × 25 22)599996 + 49997 + 3998 + 407 + 89
23)(48 × 75 ×81)?(24 × 25 × 27)
四年级数学简便计算题及答案:
1)125 ×(17 × 8)× 4 2)375 × 480 + 6250 × 48
= 125×8×4×17 =480×(375,625)
=1000×68 =480000
=68000
3)25 × 16 ×125 4)13 × 99
=25×2×8×125 =13×(100,1)
=50000 =1300,13
=1287
5)75000 ? 125 ? 15 6)7900 ? 4 ? 25
=75×1000?125?15 =7900?(4×25)
=75?15×1000?125 =79
=5×8
=40
7)150 × 40 ? 50 8)5600 ?(25 × 7)
=150?50×40 =56×100?25?7
=3×40 =56?7×100?25
=120 =32
)210 ? 42 × 6 10)39600 ? 25 9
=210?7?6×6 =396×100?25
=30 =396×4
=1584
11)67 × 21 ,18 × 21 + 85 × 79 12)321 × 81 + 321 × 19
=21×(67+18)+85×79 =321×(81+19)
=21×85+85×79 =32100
=85×(21+79)
=8500
13)222222 × 999999 14)333333 × 333333
=222222×(1000000,1) =111111×999999
=222222000000,222222 =111111×(1000000,1)
=222221777778 =111111000000,111111
=111110888889
15)56000 ? (14000 ? 16) 16)654321 × 909090 +654321×90909 =56000?14000×16 =654321×999999 =4×16 =654321×(100000,1)
=64 =654321000000,654321
=654320345679
17)34 × 3535 ,35 × 3434 18)27000 ? 125
=34×35×101,35×34×101 =27×1000?125
=0 =27×8
=216 19)345345 ? 15015 20)347 + 358 + 352 + 349
=345×1001?(15×1001) =350×4,3+8+2,1
=345?15×1001?1001 =1400+6
=23 =1406 21)75 × 45 + 17 × 25 22) 599996 + 49997 + 3998 + 407 + 89
=25×3×45+17×25 =600000+50000+4000,4,3,2+407+89
=25×(135+17) =65400+487
=25×152 =65887
=25×4×38
=3800
23)(48 × 75 ×81)?(24 × 25 × 27)
=48?24×75?25×81?27
=2×3×3