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计算:(1)-4-28-(-19)+(-24)+|-5-21|;(2)(23−112−115)×(−60)(3)1112−[(−5)2×(15)3−0.8]÷225×(−14+16)
题目详情
计算:(1)-4-28-(-19)+(-24)+|-5-21|;
(2)(
−
−
)×(−60)
(3)1
−[(−5)2×(
)3−0.8]÷2
×(−14+
)
(2)(
2 |
3 |
1 |
12 |
1 |
15 |
(3)1
1 |
12 |
1 |
5 |
2 |
5 |
1 |
6 |
▼优质解答
答案和解析
(1)-4-28-(-19)+(-24)+|-5-21|
=-4-28+19-24+26
=-4-28-24+19+26
=-56+45
=-11;
(2)(
−
−
)×(−60)
=-(
×60−
×60−
×60)
=-(40-5-4)
=-31;
(3)1
−[(−5)2×(
)3−0.8]÷2
×(−14+
)
=
-(0.2-0.8)×
×(−
)
=
+
×
×(−
)
=
-
=
-
=
.
=-4-28+19-24+26
=-4-28-24+19+26
=-56+45
=-11;
(2)(
2 |
3 |
1 |
12 |
1 |
15 |
=-(
2 |
3 |
1 |
12 |
1 |
15 |
=-(40-5-4)
=-31;
(3)1
1 |
12 |
1 |
5 |
2 |
5 |
1 |
6 |
=
13 |
12 |
5 |
12 |
5 |
6 |
=
13 |
12 |
3 |
5 |
5 |
12 |
5 |
6 |
=
13 |
12 |
5 |
24 |
=
26 |
24 |
5 |
24 |
=
7 |
8 |
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