摘要:A.110° B.115° C.120° D.130°
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计算:
(1)(-13)×(-6);
(2)(+1
)×(-1
);
(3)(-3)÷
×2;
(4)(-3
)÷(-5
);
(5)(-
+
-
-
)×(-20);
(6)(-864
)÷(-72);
(7)(
-
+
-
)÷(-
);
(8)(-
)÷(-
-
+
-
);
(9)-120×(-3
)+(-7)×(-3
)+37×(-3
).
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(1)(-13)×(-6);
(2)(+1
| 2 |
| 3 |
| 1 |
| 5 |
(3)(-3)÷
| 1 |
| 2 |
(4)(-3
| 2 |
| 3 |
| 1 |
| 2 |
(5)(-
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
(6)(-864
| 24 |
| 31 |
(7)(
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
| 2 |
| 7 |
| 1 |
| 42 |
(8)(-
| 1 |
| 30 |
| 2 |
| 3 |
| 1 |
| 10 |
| 1 |
| 6 |
| 2 |
| 5 |
(9)-120×(-3
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |