题目内容
计算
(1)(-3.6)+(+2.5)
(2)3-2×(-5)2
(3)-24×(-
+
-
)
(4)
+(-
)+
+(-
)+(-
)
(5)-14-(
-
)×[4-(-2)2]
(6)5×(-6)-(-4)2÷(-8)
(7)-7.2-0.9-5.6+1.7
(8)(-1
)+(-3.2)+|-1.8|.
(1)(-3.6)+(+2.5)
(2)3-2×(-5)2
(3)-24×(-
| 5 |
| 6 |
| 3 |
| 8 |
| 1 |
| 12 |
(4)
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
(5)-14-(
| 13 |
| 14 |
| 11 |
| 12 |
(6)5×(-6)-(-4)2÷(-8)
(7)-7.2-0.9-5.6+1.7
(8)(-1
| 3 |
| 5 |
(1)(-3.6)+(+2.5)=-1.1;
(2)3-2×(-5)2
=3-2×25
=3-50
=-47;
(3)-24×(-
+
-
)
=24×
-24×
+24×
=20-9+2
=13;
(4)
+(-
)+
+(-
)+(-
)
=(
-
)+(-
-
)+
=0-1+
=-
;
(5)-14-(
-
)×[4-(-2)2]
=-1-(
-
)×[4-4]
=-1-(
-
)×0
=-1-0
=-1;
(6)5×(-6)-(-4)2÷(-8)
=-30-16÷(-8)
=-30+2
=-28;
(7)-7.2-0.9-5.6+1.7
=-13.7+1.7
=-12;
(8)(-1
)+(-3.2)+|-1.8|
=-1.6-3.2+1.8
=-4.8+1.8
=-3.
(2)3-2×(-5)2
=3-2×25
=3-50
=-47;
(3)-24×(-
| 5 |
| 6 |
| 3 |
| 8 |
| 1 |
| 12 |
=24×
| 5 |
| 6 |
| 3 |
| 8 |
| 1 |
| 12 |
=20-9+2
=13;
(4)
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
=(
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 3 |
| 4 |
| 5 |
=0-1+
| 4 |
| 5 |
=-
| 1 |
| 5 |
(5)-14-(
| 13 |
| 14 |
| 11 |
| 12 |
=-1-(
| 13 |
| 14 |
| 11 |
| 12 |
=-1-(
| 13 |
| 14 |
| 11 |
| 12 |
=-1-0
=-1;
(6)5×(-6)-(-4)2÷(-8)
=-30-16÷(-8)
=-30+2
=-28;
(7)-7.2-0.9-5.6+1.7
=-13.7+1.7
=-12;
(8)(-1
| 3 |
| 5 |
=-1.6-3.2+1.8
=-4.8+1.8
=-3.
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