42×154减42×54脱式计算 七点06×2点4-5点七多数，多数式计算？
2个回答
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具体计算解答如下所示
42×154-42×54
=42×(154-54)
=42×100
=4200
7.06×2.4-5.7
=(7+0.06)×(2+0.4)-(6-0.3)
=14+2.8+0.12+0.024-6+0.3
=8+2.92+0.324
=8+3.244
=11.244
42×154-42×54
=42×(154-54)
=42×100
=4200
7.06×2.4-5.7
=(7+0.06)×(2+0.4)-(6-0.3)
=14+2.8+0.12+0.024-6+0.3
=8+2.92+0.324
=8+3.244
=11.244
追答
具体计算解答如下所示
42×154-42×54
=42×(154-54)
=42×100
=4200
7.06×2.4-5.7
=(7+0.06)×(2+0.4)-(6-0.3)
=14+2.8+0.12+0.024-6+0.3
=8+2.92+0.324
=8+3.244
=11.244
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