5.8*9.9用简便方法怎样做,请帮帮忙

2024-12-28 12:51:16
推荐回答(1个)
回答1:

5.8×9。9
=5.8×(10-0.1)
=5.8×10-5.8×0.1
=58-0.58
=57.42