括号七点二乘二点四减去九点四八括号除以零点二五的简便方法

2025-04-30 02:53:43
推荐回答(1个)
回答1:

(7.2×2.4-9.48)÷0.25
=(17.28-9.48)÷0.25
=7.8×4
=31.2