【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《20道计算题四年级乘法带答案》,欢迎阅读!
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×(375+625) =480000 3. 321 ×81 + 321 ×19 =321×(81+19) =32100
4. 222222 ×999999 =222222×(1000000-1) =222222000000-222222 =222221777778
5. 333333 ×333333 =111111×999999 =111111×(1000000-1) =111111000000-111111 =111110888889
6. 654321 ×909090 +654321×90909 =654321×999999 =654321×(100000-1) =654321000000-654321 =654320345679
7. 34 ×3535 -35 ×3434 =34×35×101-35×34×101 =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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