20道计算题四年级乘法带答案

2022-03-24 19:34:15   文档大全网     [ 字体: ] [ 阅读: ]

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乘法,答案,年级,计算
20道计算题四年级乘法带答案

1. 67 ×21 18 ×21 + 85 ×79 2. 375 ×480 + 6250 ×48 3. 321 ×81 + 321 ×19 4. 222222 ×999999 5. 333333 ×333333

6. 654321 ×909090 +654321 ×90909 7. 34 ×3535 35 ×3434 8. 345345 ÷15015 9. 75 ×45 + 17 ×25

10. (48 ×75 ×81)÷(24 ×25 ×27 【答案详解】

1. 67 ×21 18 ×21 + 85 ×79 =21×(67+18)+85×79 =21×85+85×79 =85×(21+79) =8500

2. 375 ×480 + 6250 ×48 =480×(375625) =480000 3. 321 ×81 + 321 ×19 =321×(81+19) =32100

4. 222222 ×999999 =222222×(10000001) =222222000000222222 =222221777778

5. 333333 ×333333 =111111×999999 =111111×(10000001) =111111000000111111 =111110888889

6. 654321 ×909090 +654321×90909 =654321×999999 =654321×(1000001) =654321000000654321 =654320345679


7. 34 ×3535 35 ×3434 =34×35×10135×34×101 =0 8. 345345 ÷15015 =345×1001÷(15×1001) =345÷15×1001÷1001 =23

9. 75 ×45 + 17 ×25 =25×3×45+17×25 =25×(135+17) =25×152 =25×4×38 =3800

10. (48 ×75 ×81)÷(24 ×25 ×27×3 =18

÷24×75÷25×81÷27 =2×3 =48

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