4.8×2.5+2点5×6.2-2点五,怎么巧算?

2024-11-26 10:37:35
推荐回答(3个)
回答1:

简便计算为
4.8*2.5+2.5*6.22-2.5
=2.5*(4.8+6.22-1)
=2.5*(10+0.02)
=2.5*10+2.5*0.02
=25+0.05
=25.05

回答2:

4.8×2.5+2点5×6.2-2点五,怎么巧算
4.8×2.5+2.5×6.2-2.5
=2.5X(4.8+6.2-1)
=2.5X(11-1)
=2.5X10
=25

回答3:

=4.8*2.5+2.5*6.2-2.5
=2.5(4.8+6.2-1)
=2.5*10
=25