问题
解答题
计算 (1)22-(-4)+(-2)+4; (2)-1-2×(-3); (3)(-81)÷
(4)(
(5)0-32÷[(-2)3-(-4)]; (6)(-3)2-[(-
(7)-14÷(-5)2×(-
(8)-3×(-
|
答案
(1)22-(-4)+(-2)+4
=22+4-2+4
=30-2
=28;
(2)-1-2×(-3)
=-1+6
=5;
(3)(-81)÷
×9 4
÷(-4 9
)1 36
=81×
×4 9
×364 9
=576;
(4)(
-7 9
+5 6
)×(-36)3 4
=-
×36+7 9
×36-5 6
×363 4
=-28+30-27
=-55+30
=-25;
(5)0-32÷[(-2)3-(-4)]
=0-9÷[(-8)-(-4)]
=0-9÷(-4)
=0+2.25
=2.25;
(6)(-3)2-[(-
)+(-2 3
)]÷1 4 1 12
=9-[(-
)+(-2 3
)]×121 4
=9+8+3
=20;
(7)-14÷(-5)2×(-
)+|0.8-1|5 3
=-1÷25×(-
)+5 3 1 5
=
+1 15 1 5
=
;4 15
(8)-3×(-
)2-4×(1-2 3
)-8÷(2 3
)22 3
=-3×
-4×4 9
-8÷1 3 4 9
=-1
-11 3
-181 3
=-20
.2 3