问题
解答题
计算: (1)(-3)+(-4)-(+11)-(-9); (2)-5
(3)(
(4)(-81)÷
(5)-14÷(-52)×(-
(6)
|
答案
(1)(-3)+(-4)-(+11)-(-9)=-3-4-11+9=-18+9=-9;
(2)-5
-[-1.5-(4.5-43 4
)]=-53 4
-(-1.5-4.5+43 4
)=-53 4
+1.5+4.5-43 4
=-3 4
+6=-39 4
;15 4
(3)(
-2 3
-1 12
)×(-60)=1 15
×(-60)-2 3
×(-60)-1 12
×(-60)=-40+5+4=-31;1 15
(4)(-81)÷
×9 4
÷(-16)=81×4 9
×4 9
×4 9
=1;1 16
(5)-14÷(-52)×(-
)+|0.8-1|=-1×(-5 3
)×(-1 25
)+0.2=-5 3
+1 15
=1 5
;2 15
(6)
×(-23)÷1 4
-(-8)÷[(-0.2)2-(-0.96) ] =4 5
×(-8)×(1 4
)-(-8)÷(0.04+0.96)=-2.25-(-8)=5.75.5 4