七点2×0点2+2点4×1点四简便运算

七点2×0点2+2点4×1点四简便运算
2024-07-11 23:24:49
推荐回答(2个)
回答1:


4.8

回答2:

7.2×0.2+2.4×1
=2.4×3×0.2+2.4×1
=2.4×0.6+2.4×1
=2.4×(0.6+1)
=2.4×1.6
=2.4+1.44
=3.84