(4.2-4.2⼀2.1)*0.8的简算方法

2025-06-20 11:27:13
推荐回答(2个)
回答1:


请采纳

回答2:

(4.2-4.2÷2.1)x0.8
=(4.2-2)x0.8
=2.2x0.8
=2x0.8+0.2x0.8
=1.6+0.16
=1.76