问题
解答题
计算: (1)3×(-4)-(-28)÷7. (2)-(-3-5)+(-3)2×(1-3). (3)36×(
(4)(x-2y)-2(y-3x). |
答案
(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.
计算: (1)3×(-4)-(-28)÷7. (2)-(-3-5)+(-3)2×(1-3). (3)36×(
(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.