8.9x3.2十0.68x89用简便方法计

2024-12-13 05:45:42
推荐回答(2个)
回答1:

=8.9X3.2+6.8X8.9=8.9X(3.2+6.8)=8.9X10=89

回答2:

8.9x3.2十0.68x89
=8.9x3.2十6.8x8.9
=8.9x(3.2十6.8)
=8.9*10
=89