数学
直接写出下列各题的得出.
(1)-1+2=
1
1
,
(2)-2-(-3)=
1
1
,
(3)-2-2=
-4
-4
,
(4)0-2010=
-2010
-2010
,
(5)1÷(-2)×
1
2
=
-
1
4
-
1
4
,
(6)-(-
1
2
)
3
=
1
8
1
8
,
(7)-|-8|=
-8
-8
,
(8)15.7÷(-
7
38
)×0=
0
0
,
(9)(-8)×
3
2
=
-12
-12
,
(10)(-1)
2010
=
1
1
.
13×
2
3
+0.34×
2
7
+
1
3
×13+
5
7
×0.34.
计算:
-
1
4
+2
1
3
+4
1
5
÷|-3|×(-
5
21
)
.
计算:
(1)-20+(-15)-(-14)-18; (2)(-20)×(-6)-(-48)÷8;
(3)
-2
1
6
×5-2
1
6
×(-4)+
13
6
×(-8)
; (4)-16÷
(-2)
3
-(-
1
8
)×(-4)
.
计算:
(1)4+(-2)
2
×2-(-36)÷4;
(2)-1
4
-(1-0.5)×
1
3
×[2-(-3)
2
].
计算:
(1)-2-3-5
(2)
(-2)÷
1
3
×(-3)
(3)
(
2
3
-
1
12
-
4
15
)×(-60)
(4)-1
4
+8-2
3
÷(-4)×(-7+5)
(5)100-(-3)÷(
3
4
)
(6)-11-2×(-33)+(-22)
(7)-32÷[-3
2
-(-2)
3
].
计算:
(1)|-2|-(-2.5)-|1-4|
(2)2×(-3)
2
-3
3
-6÷(-2)
(3)[
25
24
-
(
3
8
+
1
6
-
3
4
)×24]÷5
(4)
29
12
13
×(-26)
.
计算
(1)(-3)+(-4)+(+1)-(-9);
(2)-6.5+4
1
4
+8.75-3
1
2
+5 (用简便运算)
(3)(-2)×
3
2
÷(-
3
4
)×4
(4)-3
2
+(-1)
2001
÷(-
1
2
)
2
-(0.25-
3
8
)×6.
计算:
(1)-3-7+12
(2)|-5|+(-5)+4
(3)
3
4
×(8-
4
3
-
16
15
)
(4)-
1
2
-
5
4
+
3
2
-(-
1
4
)
(1)-150+250
(2)
6
3
5
+2-
1
2
-6.6
(3)
(-
5
12
)×
8
15
÷(-
3
2
)
(4)-8+4÷(-2)
(5)
-
1
4
-(1+0.5)×
1
3
÷(-4)
(6)
(
1
4
+
5
6
-
1
2
)×12
.
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