简便计算 15⼀3×20%+1⼀5×2-0.2?

2025-01-06 03:26:47
推荐回答(4个)
回答1:

原式=15/3x1/5+1/5x2-1/5
=1+2/5-1/5
=1+1/5
=1又1/5
又=1.2

回答2:

=5×1/5+1/5×2-1/5
=(5+2-1)×1/5
=6×1/5
=1.2

回答3:

回答4:

15/3×1/5+1/5×2-1/5=1/5×(5+2-1)=6/5=1.2