题目内容
计算:
(1)3×(-4)-(-28)÷7.
(2)-(-3-5)+(-3)2×(1-3).
(3)36×(
-
-
).
(4)(x-2y)-2(y-3x).
(1)3×(-4)-(-28)÷7.
(2)-(-3-5)+(-3)2×(1-3).
(3)36×(
| 1 |
| 9 |
| 1 |
| 6 |
| 1 |
| 18 |
(4)(x-2y)-2(y-3x).
(1)原式=-12-(-4)=-12+4=-8;
(2)原式=-(-8)+9×(-2)=8-18=-10;
(3)原式=4-6-2=-4;
(4)原式=x-2y-2y+6x=7x-4y.
(2)原式=-(-8)+9×(-2)=8-18=-10;
(3)原式=4-6-2=-4;
(4)原式=x-2y-2y+6x=7x-4y.
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