7.5Ⅹ3.8+8.6Ⅹ2.5的简便计算

7.5Ⅹ3.8+8.6Ⅹ2.5的简便计算
2025-12-25 10:24:57
推荐回答(1个)
回答1:

7.5Ⅹ3.8+8.6Ⅹ2.5
=2.5×3×3.8+8.6×2.5
=2.5×(3×3.8+8.6)
=2.5×(11.4+8.6)
=2.5×20
=50