问题 解答题
直接写得数
3.2-0.7=0.45+1.08=1-0.09=0.72÷0.9=
5X+2X=8.5a-2.7a=0.6×0.4×2.5=31.4÷0.314=
答案

3.2-0.7=2.5,0.45+1.08=1.53,1-0.09=0.91,0.72÷0.9=0.8,
5X+2X=7X,8.5a-2.7a=5.8a,0.6×0.4×2.5=0.6,31.4÷0.314=100.

单项选择题
单项选择题