题目内容
计算
(1)22-(-4)+(-2)+4;
(2)-1-2×(-3);
(3)(-81)÷
×
÷(-
);
(4)(
-
+
)×(-36);
(5)0-32÷[(-2)3-(-4)];
(6)(-3)2-[(-
)+(-
)]÷
;
(7)-14÷(-5)2×(-
)+|0.8-1|;
(8)-3×(-
)2-4×(1-
)-8÷(
)2.
(1)22-(-4)+(-2)+4;
(2)-1-2×(-3);
(3)(-81)÷
9 |
4 |
4 |
9 |
1 |
36 |
(4)(
7 |
9 |
5 |
6 |
3 |
4 |
(5)0-32÷[(-2)3-(-4)];
(6)(-3)2-[(-
2 |
3 |
1 |
4 |
1 |
12 |
(7)-14÷(-5)2×(-
5 |
3 |
(8)-3×(-
2 |
3 |
2 |
3 |
2 |
3 |
(1)22-(-4)+(-2)+4
=22+4-2+4
=30-2
=28;
(2)-1-2×(-3)
=-1+6
=5;
(3)(-81)÷
×
÷(-
)
=81×
×
×36
=576;
(4)(
-
+
)×(-36)
=-
×36+
×36-
×36
=-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-[(-
)+(-
)]÷
=9-[(-
)+(-
)]×12
=9+8+3
=20;
(7)-14÷(-5)2×(-
)+|0.8-1|
=-1÷25×(-
)+
=
+
=
;
(8)-3×(-
)2-4×(1-
)-8÷(
)2
=-3×
-4×
-8÷
=-1
-1
-18
=-20
.
=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 |
4 |
9 |
=576;
(4)(
7 |
9 |
5 |
6 |
3 |
4 |
=-
7 |
9 |
5 |
6 |
3 |
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 |
1 |
4 |
=9+8+3
=20;
(7)-14÷(-5)2×(-
5 |
3 |
=-1÷25×(-
5 |
3 |
1 |
5 |
=
1 |
15 |
1 |
5 |
=
4 |
15 |
(8)-3×(-
2 |
3 |
2 |
3 |
2 |
3 |
=-3×
4 |
9 |
1 |
3 |
4 |
9 |
=-1
1 |
3 |
1 |
3 |
=-20
2 |
3 |

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