
计算:(1)-20+(-5)-(-18);(2)(-34+56-712)÷(-124);(3)8-23÷(-4)×(-7+5)
计算:(1)-20+(-5)-(-18);(2)(-34+56-712)÷(-124);(3)8-23÷(-4)×(-7+5)....
计算:(1)-20+(-5)-(-18);(2)(-34+56-712)÷(-124);(3)8-23÷(-4)×(-7+5).
展开
1个回答
展开全部
(1)-20+(-5)-(-18)
=-20+(-5)+18
=-25+18
=-7;
(2)(-
+
-
)÷(-
)
=(-
+
-
)×(-24)
=-
×(-24)+
×(-24)-
×(-24)
=18-20+14
=12;
(3)8-23÷(-4)×(-7+5)
=8-8÷(-4)×(-2)
=8-(-2)×(-2)
=8-4
=4.
=-20+(-5)+18
=-25+18
=-7;
(2)(-
3 |
4 |
5 |
6 |
7 |
12 |
1 |
24 |
=(-
3 |
4 |
5 |
6 |
7 |
12 |
=-
3 |
4 |
5 |
6 |
7 |
12 |
=18-20+14
=12;
(3)8-23÷(-4)×(-7+5)
=8-8÷(-4)×(-2)
=8-(-2)×(-2)
=8-4
=4.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询