四年级数学简便计算题及答案复习过程

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四年级数学简便计算题及答案

1125 ×17 × 8× 4 2375 × 480 + 6250 × 48

325 × 16 ×125 413 × 99

575000 ÷ 125 ÷ 15 67900 ÷ 4 ÷ 25

7150 × 40 ÷ 50

9210 ÷ 42 × 6

1167 × 21 18 × 21 + 85 × 79

13222222 × 999999 1556000 ÷ 14000 ÷ 16

1734 × 3535 35 × 3434

19345345 ÷ 15015

2175 × 45 + 17 × 25 2348 × 75 ×81)÷(24 × 25 × 27 精品文档

85600 ÷(25 × 7 1039600 ÷ 25 12321 × 81 + 321 × 19 14333333 × 333333 16654321 × 909090 +654321 × 90909 1827000 ÷ 125 20347 + 358 + 352 + 349 22599996 + 49997 + 3998 + 407 + 89
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四年级数学简便计算题及答案: 1125 ×17 × 8× 4 2375 × 480 + 6250 × 48 = 125×8×4×17 =480×(375625) =1000×68 =480000 =68000

325 × 16 ×125 413 × 99 =25×2×8×125 =13×(1001) =50000 =130013

575000 ÷ 125 ÷ 15 =75×1000÷125÷15 =75÷15×1000÷125 =5×8 =40

7150 × 40 ÷ 50 =150÷50×40 =3×40 =120

9210 ÷ 42 × 6 =210÷6 =30

1167 × 21 18 × 21 + 85 × 79 =21×(67+18)+85×79 =21×85+85×79 =85×(21+79) =8500

13222222 × 999999 =222222×(10000001) =222222000000222222 =222221777778

1556000 ÷ 14000 ÷ 16 =56000÷14000×16 =4×16 =64 精品文档

=1287 67900 ÷ 4 ÷ 25 =7900÷(4×25) =79 85600 ÷(25 × 7 =56×100÷25÷7 =56÷100÷25 =32 1039600 ÷ 25 =396×100÷25 =396×4 =1584 12321 × 81 + 321 × 19 =321×(81+19) =32100 14333333 × 333333 =111111×999999

=111111×(10000001) =111111000000111111 =111110888889 16654321 × 909090 +654321×90909 =654321×999999 =654321×(1000001) =654321000000654321 =654320345679
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1734 × 3535 35 × 3434 1827000 ÷ 125 =34×35×10135×34×101 =27×1000÷125 =0 =27×8 =216

19345345 ÷ 15015 20347 + 358 + 352 + 349 =345×1001÷(15×1001) =350×43+8+21 =345÷15×1001÷1001 =1400+6 =23 =1406

2175 × 45 + 17 × 25 =25×3×45+17×25 =25×(135+17) =25×152 =25×38 =3800 2348 × 75 ×81)÷(24 × 25 × 27 =48 × 75 ×81÷24÷25÷27 =48÷24×75÷25×81÷27 =2×3 =18

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22) 599996 + 49997 + 3998 + 407 + 89 =600000+50000+4000432+407+89 =65400+487 =65887

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