如题所述
第1个回答 2022-12-20
回答:
7.85×9.9
=7.85×(10-0.1)
=7.85×10-7.85×0.1
=78.5-0.785
=77.715
运用了乘法分配律本回答被网友采纳
7.85×9.9
=7.85×(10-0.1)
=7.85×10-7.85×0.1
=78.5-0.785
=77.715
运用了乘法分配律本回答被网友采纳
第2个回答 2022-12-20
7.85*9.9
=7.85*(10-0.1)
=7.85*10-7.85*0.1
=78.5-0.785
=78-0.285
=77.715
=7.85*(10-0.1)
=7.85*10-7.85*0.1
=78.5-0.785
=78-0.285
=77.715