题目内容
计算题
(1)(+3
)+(-2
)+(+1
)-(+3
)+(-3
)+(+5
)
(2)(1
-2
+3
-4
)÷(-
)
(3)(-2)÷[(-
)2×(
)3]×|-
|-(-48)
(4)-22×(-
)+4+(-3)3÷2
×(-
)2.
(1)(+3
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 8 |
| 5 |
| 12 |
| 2 |
| 3 |
| 7 |
| 12 |
(2)(1
| 4 |
| 5 |
| 1 |
| 3 |
| 7 |
| 10 |
| 8 |
| 15 |
| 1 |
| 30 |
(3)(-2)÷[(-
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 4 |
(4)-22×(-
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
(1)原式=(3
-3
)+(-2
+1
)+(-3
+5
)=-1
+2
=
;
(2)原式=(1
-2
+3
-4
)×(-30)=
×(-30)-
×(-30)+
×(-30)-
×(-30)=-54+70-111+136=41;
(3)原式=(-2)÷(
×
)×
+48=(-2)×32×
+48=-48+48=0;
(4)原式=-4×(-
)+4+(-27)×
×
=
+4-
=4.
| 2 |
| 3 |
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 8 |
| 5 |
| 12 |
| 7 |
| 12 |
| 3 |
| 4 |
| 1 |
| 6 |
| 5 |
| 12 |
(2)原式=(1
| 4 |
| 5 |
| 1 |
| 3 |
| 7 |
| 10 |
| 8 |
| 15 |
| 9 |
| 5 |
| 7 |
| 3 |
| 37 |
| 10 |
| 68 |
| 15 |
(3)原式=(-2)÷(
| 1 |
| 4 |
| 1 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
(4)原式=-4×(-
| 1 |
| 3 |
| 4 |
| 9 |
| 4 |
| 9 |
| 4 |
| 3 |
| 4 |
| 3 |
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