题目内容
计算:
(1)18-(-7)
(2)-8×(-6)÷
(3)(-48)×﹙-
+
-
﹚
(4)3+20÷22×(-
)-12.
(1)18-(-7)
(2)-8×(-6)÷
| 4 |
| 5 |
(3)(-48)×﹙-
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 12 |
(4)3+20÷22×(-
| 1 |
| 5 |
(1)18-(-7)=25;
(2)-8×(-6)÷
=48÷
=60;
(3)(-48)×﹙-
+
-
﹚
=48×
-48×
+48×
=8-36+4
=-24;
(4)3+20÷22×(-
)-12
=3+20÷4×(-
)-12
=3+5×(-
)-12
=3-1-12
=-10.
(2)-8×(-6)÷
| 4 |
| 5 |
=48÷
| 4 |
| 5 |
=60;
(3)(-48)×﹙-
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 12 |
=48×
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 12 |
=8-36+4
=-24;
(4)3+20÷22×(-
| 1 |
| 5 |
=3+20÷4×(-
| 1 |
| 5 |
=3+5×(-
| 1 |
| 5 |
=3-1-12
=-10.
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