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计算(1)-20+(-14)-(-18)-13;(2)234+0.25−(−712)+(−214)−1.5−2.75;(3)(−34−59+712)÷136;(4)−14÷(−5)2×(−53)+|0.8−1|.
题目详情
计算
(1)-20+(-14)-(-18)-13;
(2)2
+0.25−(−7
)+(−2
)−1.5−2.75;
(3)(−
−
+
)÷
;
(4)−14÷(−5)2×(−
)+|0.8−1|.
(1)-20+(-14)-(-18)-13;
(2)2
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(3)(−
| 3 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
| 1 |
| 36 |
(4)−14÷(−5)2×(−
| 5 |
| 3 |
▼优质解答
答案和解析
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-29;
(2)2
+0.25−(−7
)+(−2
)−1.5−2.75
=2.75+0.25+7.5-2.25-1.5-2.75
=(2.75-2.75)+(0.25-2.25)+(7.5-1.5)
=0-2+6
=4;
(3)(−
−
+
)÷
=(-
-
+
)×36
=-27-20+21
=-26;
(4)−14÷(−5)2×(−
)+|0.8−1|
=1×
×
+0.2
=
+
=
.
=-20-14+18-13
=-29;
(2)2
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=2.75+0.25+7.5-2.25-1.5-2.75
=(2.75-2.75)+(0.25-2.25)+(7.5-1.5)
=0-2+6
=4;
(3)(−
| 3 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
| 1 |
| 36 |
=(-
| 3 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
=-27-20+21
=-26;
(4)−14÷(−5)2×(−
| 5 |
| 3 |
=1×
| 1 |
| 25 |
| 5 |
| 3 |
=
| 1 |
| 15 |
| 3 |
| 15 |
=
| 4 |
| 15 |
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