2.5乘3.6简便运算怎么算?

如题所述

2.5x3.6
=2.5x(0.4x9)
=(2.5x0.4)x9
=1x9
=9
或:2.5x(4-0.4)
=2.5x4-2.5x0.4
=10-1
=9
希望能帮到你!
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