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计算:(1)-20+(-5)-(-18);(2)(-5)×3+(-6)÷(-2);(3)(−34+56−712)÷(−124);(4)8−23÷(−4)×(−7+5)+0÷211×(−32).
题目详情
计算:
(1)-20+(-5)-(-18);
(2)(-5)×3+(-6)÷(-2);
(3)(−
+
−
)÷(−
);
(4)8−23÷(−4)×(−7+5)+0÷
×(−
).
(1)-20+(-5)-(-18);
(2)(-5)×3+(-6)÷(-2);
(3)(−
3 |
4 |
5 |
6 |
7 |
12 |
1 |
24 |
(4)8−23÷(−4)×(−7+5)+0÷
2 |
11 |
3 |
2 |
▼优质解答
答案和解析
(1)原式=[(-20)+(-5)]+18
=(-25)+18
=-7;
(2)原式=(-15)+3
=-12;
(3)原式=(-
+
-
)×(-24)
=-
×(-24)+
×(-24)-
×(-24)
=18-20+14
=12;
(4)原式=8-8÷(-4)×(-2)+0
=8-(-2)×(-2)
=8-4
=4.
=(-25)+18
=-7;
(2)原式=(-15)+3
=-12;
(3)原式=(-
3 |
4 |
5 |
6 |
7 |
12 |
=-
3 |
4 |
5 |
6 |
7 |
12 |
=18-20+14
=12;
(4)原式=8-8÷(-4)×(-2)+0
=8-(-2)×(-2)
=8-4
=4.
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