4.2×26 42×4.7 0.42×270用简便计算得?

2025-04-23 12:47:15
推荐回答(2个)
回答1:

4.2×26 42×4.7 0.42×270用简便计算得?
=4.2x(26+10x4.7+27)
=4.2x100
=420

回答2:

当中加号还是减号