5.2×11 2.6×78简便计算?

2024-12-01 16:34:52
推荐回答(1个)
回答1:

这个题目应该是这样的吧
5.2×11+2.6×78
5.2×11+2.6×2×39
=5.2×(11+39)
=5.2×50
=260