99.9ᘧ࿾77.8 阧33.3 ᘧ࿾66.6简算?

2024-12-26 16:26:28
推荐回答(3个)
回答1:

很高兴为你解答!
99.9*77.8-33.3*66.6
=99.9*77.8-33.3*3*22.2
=99.9*(77.8-22.2)
=99.9*55.6
=(100-0.1)*55.6
=556-5.56
=550.44

回答2:

这个题目的话可以先把99.9变成100-0.1然后33.3×66.6变成99.9×22.2。

回答3:

99.9×(77.8-22.2)
=99.9×55.6
=(100-0.1)×55.6
=5560-5.56
=5554.44