A-A+
耐心算一算(1)(-3)+(-4)-(11)-(-19);(2)-3.5÷78×(-87)×
问题详情
耐心算一算
(1)(-3)+(-4)-(11)-(-19);
(2)-3.5÷
(3)(
(4)-12-(1-0.5)×
参考答案
(1)原式=-3-4-11+19
=-18+19
=1;
(2)原式=72×87×87×364
=314;
(3)原式=-38×48+23×48-12×48
=-18+32-24
=-42+32
=-10;
(4)原式=-1-12×13×[2-9].
=-1+-12×13×[-7].
=-1+76
=16.
考点: