题目内容
计算:
(1)-
×(-3)+(-
)×5
(2)(
-
-
)×(-60)
(3)-1
-(-
)+3
+(-2
)
(4)-42÷(-
)÷(-1)7+(1
+1
-
)×24.
(1)-
| 1 |
| 3 |
| 1 |
| 5 |
(2)(
| 2 |
| 3 |
| 11 |
| 12 |
| 14 |
| 15 |
(3)-1
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
(4)-42÷(-
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 4 |
(1)-
×(-3)+(-
)×5
=1-1
=0;
(2)(
-
-
)×(-60)
=-
×60+
×60+
×60
=-40+55+56
=71;
(3)-1
-(-
)+3
+(-2
)
=(-1
-2
)+(
+3
)
=-4+3
=-
;
(4)-42÷(-
)÷(-1)7+(1
+1
-
)×24
=-16×2÷1+(27+32-18)
=-32+41
=9.
| 1 |
| 3 |
| 1 |
| 5 |
=1-1
=0;
(2)(
| 2 |
| 3 |
| 11 |
| 12 |
| 14 |
| 15 |
=-
| 2 |
| 3 |
| 11 |
| 12 |
| 14 |
| 15 |
=-40+55+56
=71;
(3)-1
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=(-1
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 8 |
| 3 |
| 8 |
=-4+3
| 1 |
| 2 |
=-
| 1 |
| 2 |
(4)-42÷(-
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 4 |
=-16×2÷1+(27+32-18)
=-32+41
=9.
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