Question

5.1×3.5+59×0.35-3.5的简便运算？

Answer 1

5.1*3.5+59*0.35-3.5
=5.1*3.5+5.9*3.5-3.5
=（5.1+5.9-1）*3.5
=10*3.5
=35

Answer 2

将59×0.35转变为5.9×3.5则可得：
5.1×3.5+5.9×3.5-3.5
=3.5×（5.1+5.9-1）
=3.5×10.0
=35