A-A+
耐心算一算(1)23+(-18)-(-13)+(-38)(2)3.5÷(-78)×(-34)
问题详情
耐心算一算
(1)
(2)3.5÷(-
(3)(
(4)(-3)2×(-2)-[(-2)×(-1)]2
(5)(4x2y-3xy2)-(1+4x2y-3xy2)
(6)4y2-[3y-(3-2y)+2y2].
参考答案
(1)原式=(23+13)+(-18-38)=1-12=12;
(2)原式=72×(-87)×(-34)=3;
(3)原式=-3-2+6=1;
(4)原式=9×(-2)-4=-18-4=-22;
(5)原式=4x2y-3xy2-1-4x2y+3xy2=-1;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
考点: