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56.5x9.9+56.5用简便方法怎么做

解题: 56.5x9.9+56.5 =56.5x(9.9+1) =56.5x(10+1-0.1) =...

56.5×9.9+5.65 =5.65×99+5.65 =5.65×(99+1) =5.65×...

56.5x9.9+56.5 =56.5×(9.9+1) =56.5×(10+1-0.1) =5...

=56.5×(9.9+0.1) =56.5×10 =565

这道题可以运用乘法分配律使计算简便 56.5x9.9+5.65 =5.65x10x9.9+5.6...

12.5x56 =(12.5x8)x7 =100x7 =700

后面的乘号应该是加号吧,不然无法用简便运算。 56.5x9.9+5.65 =5.65x99+5....

56.5X9.9十5.65X1 =5.65*99+5.65*1 =5.65*(99+1) ...

简便计算:43.5+56.5x12 =43.5+56.6+56.5×10+56.5 =100+565...

1245×5.65+124.5×56.5-12.45×565-24.5×56.5 =5.65×124...

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