问题
解答题
计算: (1)(-1.25)+1
(2)(-6)-(+6) (3)-22×(-3)2 (4)18-(+12)+(-21)+(+12) (5)(-23)÷(-3)×
(6)(
(7)(-2
(8)(-3)×(-3
|
答案
(1)原式=-1.25+1.25
=0;
(2)原式=-6-6
=-12;
(3)原式=-4×9
=-36;
(4)原式=18-12-21+12
=-3;
(5)原式=
×23 3 1 3
=
;23 9
(6)原式=
×(-36)+1 2
×(-36)-5 6
×(-36)7 12
=-18-30+21
=-27;
(7)原式=(-
×14 5
-11 6
×4-1 4
)×(-1)2 5
=(-
-1-77 15
)×(-1)2 5
=
;98 15
(8)原式=3
×(3+9-12)6 17
=0.