问题
解答题
计算: (1)-100+157; (2)-18+(-32); (3)-9-27; (4)-29-(-12); (5)-8×(-15); (6)(-4)÷(-
(7)-5.6÷(-8); (8)72÷(-
(9)(-0.03)×(-100); (10)(-0.03)÷(-0.01); (11)3.2÷(-1
(12)(-0.75)÷(-5
|
答案
(1)原式=57;
(2)原式=-18-32=-50;
(3)原式=-36;
(4)原式=-29+12=-17;
(5)原式=120;
(6)原式=4×4=16;
(7)原式=5.6×
=0.7;1 8
(8)原式=72×(-3)=-216;
(9)原式=3;
(10)原式=3;
(11)原式=
×(-16 5
)=-2;5 8
(12)原式=
×3 4
=8 45
.2 15