7.23×9.8简便运算如题

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7.23×9.8简便运算如题7.23×9.8简便运算如题7.23×9.8简便运算如题7.23*9.8=7.23*10-7.23*0.2=72.3-1.446=70.8547.23×9.8=7.23×(

7.23×9.8简便运算如题
7.23×9.8简便运算
如题

7.23×9.8简便运算如题
7.23*9.8=7.23*10-7.23*0.2=72.3-1.446=70.854

7.23×9.8
=7.23×(10-0.2)
=72.3-1.446
=70.854