39ᘧ࿾68-39+33ᘧ࿾39用简便方法计算

2024-10-30 12:16:59
推荐回答(2个)
回答1:

39x(68-1+33)

回答2:

39×68-39+33×39
=39×(68-1+33)
=39×100
=3900