Question

3.25*4.7+7.8用简便方法怎么算

小学五年级的题，要用简便方法算

Answer 1

3.25*4.7+7.8
=3.25×（4.8-0.1）+7.8
=3.25×4.8-3.25×0.1+7.8
=3.25×4×1.2+7.8-0.325
=13×1.2+7.8-0.325
=15.6+7.8-0.325
=23.4-0.325
=23.075

Answer 2

3.25*4.7+7.8
=3.25×（4.8-0.1）+7.8
=3.25×4.8-3.25×0.1+7.8
=3.25×4×1.2+7.8-0.325
=13×1.2+7.8-0.325
=15.6+7.8-0.325
=23.4-0.325
=23.075
这就是简便的了，嗯........不过好像很多！

Answer 3

没有简便运算(ಡωಡ) 😭😎

Answer 4

题干不详无法解答