7.69-5.22+15.97的简便运算。急速需要啊。

2025-02-23 04:36:13
推荐回答(2个)
回答1:

7.69-5.22+15.97
=(7-5+15)+(0.69-0.22+0.97)
=17+(0.6-0.2+0.9)+(0.09-0.02+0.07)
=17+1.3+0.14
=18.44

回答2:

7.69-5.22+15.97
=7.7+16-(5.22+0.04)
=18.44