脱式计算(能简算的要简算)4.32-2.5+1.8913.58-(4.56+3

2024-11-24 22:49:22
推荐回答(1个)
回答1:

(1)4.32-2.5+1.89
=1.82+1.89
=3.71;

(2)13.58-(4.56+3.58)
=13.58-3.58-4.56
=10-4.56
=5.44;

(3)4.5×0.7+5.5×0.7
=(4.5+5.5)×0.7
=10×0.7
=7;

(4)82.4-12.4×5
=82.4-62
=20.4.