来自韩力的问题
简算101乘26.9减1.25乘26.9乘0.8
简算101乘26.9减1.25乘26.9乘0.8
1回答
2020-07-21 09:56
简算101乘26.9减1.25乘26.9乘0.8
简算101乘26.9减1.25乘26.9乘0.8
101乘26.9减1.25乘26.9乘0.8
=101×26·9-26·9×(1.25×0.8)
=101×26·9-26·9×1
=26·9×(101-1)
=26·9×100
=2690