题目内容
计算:
(1)(-20)+(+3)-(-5)-(-7);
(2)(-
-
+
)×(-36);
(3)-22×(-5)-6÷(-2)2×|-
|.
(1)(-20)+(+3)-(-5)-(-7);
(2)(-
| 3 |
| 4 |
| 7 |
| 9 |
| 5 |
| 12 |
(3)-22×(-5)-6÷(-2)2×|-
| 1 |
| 4 |
(1)原式=-20+3+5+7
=-5;
(2)原式=(-
)×(-36)-
×(-36)+
×(-36)
=27+28-15
=40;
(3)原式=-4×(-5)-6÷4×
=20-
×
=20-
=19
.
=-5;
(2)原式=(-
| 3 |
| 4 |
| 7 |
| 9 |
| 5 |
| 12 |
=27+28-15
=40;
(3)原式=-4×(-5)-6÷4×
| 1 |
| 4 |
=20-
| 3 |
| 2 |
| 1 |
| 4 |
=20-
| 3 |
| 8 |
=19
| 5 |
| 8 |
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