Question

2.25×9有简便算法吗

Answer 1

你好
2.25×9
=2.25×（10-1）
=2.25×10-2.25×1
=22.5-2.25
=20.25
希望能帮到你！

Answer 2

2.25×9有简便算法吗
2.25×9
=2.25x(10-1)
=22.5-2.25
=20.25

Answer 3

2.25*9
=2.25*（10-1）
=2.25*10-2.25*1
=22.5-2.25
=20.25
拆分，运用乘法分配律，凑整，简便运算。

Answer 4

2.25X9
=2.25X10一2.25
=22.5一2.25
=20.25

Answer 5

2.25乘以10减去2.25乘以1