> 数学 >
(-5)*(+7 1/3)+7*(-7 1/3)-(+12)*(-7 1/3)=多少?(要用简便方法)
人气:487 ℃ 时间:2020-02-03 14:43:21
解答
(-5)*(+7 1/3)+7*(-7 1/3)-(+12)*(-7 1/3)
= (- 5 - 7 + 12)*(+7 1/3)
= 0 *(+7 1/3)
= 0
推荐
猜你喜欢
© 2025 79432.Com All Rights Reserved.
电脑版|手机版