Question

15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262=?

谁知道？？

Answer 1

这些题目全部都是因式分解，都用了乘法分配律。

原式=15.37x7.88+1.537x21.2 - 9.37x7.38-93.7x0.262
=15.37x7.88+15.37x2.12 - （9.37x7.38+9.37x2.62）
=15.37x（7.88+2.12）- 9.37x（7.38+2.62）
=15.37x10-9.37x10
=(15.37-9.37)x10
=6x10
=60
这些题目全部都是因式分解，都用了乘法分配律

Answer 2

15.37x7.88-9.37x7.38+1.537x21.2-93.7x0.262=
15.37x(7.88+2.12)-9.37x(7.38+2.62)+
153.7-93.7=
60
详细步骤见此

Answer 3

60嘛（计算器捺的）

Answer 4

60

Answer 5

60