人教版七年级上册有理数的混合运算练习题40道(带答案)(2)(最新整理)
- 格式:docx
- 大小:123.28 KB
- 文档页数:9
有理数的混合运算专题训练
1. 先乘方,再乘除,最后加减;
2. 同级运算,从左到右进行;
3. 如有括号,先做括号内的运算,按小括号、中括号、大括号依次进行。
1、 1 + (- 2) + 4 + (- 1 ) + (- 1)
2 3 5 2 3
2、(-81) ÷ (-2.25) ⨯(- 4
) ÷16
9
3、11+ (-22) - 3⨯(-11)
4、(+12) ⨯(- 3) -15⨯(- 1
1 )
4 5
5、- 3 ⨯[-32 ⨯(- 2
)2 - 2]
2 3
6、 0 - 23 ÷ (-4)3 - 1
8
7、12 ÷[(- 1 )2 - 1
)]
8、[(-2)2 ⨯ (-3)]⨯ 1
2 2
12
9、[(-0.5)2 - 2
] ⨯ (-62 )
10、| - 5 | ⨯(- 3
)3 ÷ 3
2 3
14 7 14
1 ) 1 )
11、—22—(—2)2—23+(—2)3
12、-62
⨯(- 1 2 - (-3)2
÷ (- 1 3 ⨯(-3) 2 2
13、-(-1)1997 - (1- 0.5) ⨯ 1 ÷ (- 1
)
14、(-1)3 - (- 1 ⨯ 4
+ (-3)3 ÷[(-2)5 + 5]
3
12
8 )
2 17
15、-10 + 8÷(-2 )2
-(-4 )×(-3 )
16、-49 + 2×(-3 )2
1
+ (-6 )÷(- )
9
4
1 2
2
1 2 3 1
17、-1 + ( 1-0.5 )× ×[2×(-3) ]
18、(-2) -2×[(- ) -3× ]÷ .
3
2 4 5
19、5 ⨯ (-6) - (-4)2 ÷ (-8)
20、(- 3)2 + (- 2
+ 1) ⨯ 0
4 3
21、( 7
-
5
+
3
) ⨯ (-12) ÷ 6 22、(-
5
) ⨯ (-4)2- 0.25 ⨯ (-5) ⨯ (-4)2
12 6 4 8
23、(-1
)2+
1
⨯ (
2
-
2
- 2 ) 24、- 42⨯[(-7) ÷ 6]+[(-5)3- 3]÷ (-2)3 2 2 3 3
25、6-(-12)÷(-2)226、(-48)÷ 8 -(-5)÷(-
1
)2
2
27、42×(-2
) + (-
3
) ÷ 0.2528、(-81
1
)÷(-3)2 3 4 9
29、- 2 ⨯(- 3)2 -(- 3)3 ÷ 3 30、(-5)×6+(-125) ÷(-5)3
31、-- 0.25 ⨯ (-5) ⨯ 4 ⨯ (-1
)32、-12+(
2
-
1
)÷
1
+(-3)2 25 3 2 6
1、【基础题】计算:(1)18-6 ÷(-2)⨯1
;(2)3+22⨯
1
;
(-)
3 (-)
5
(3)(-9)⨯(-4)+(-60)÷12;(4)(-3)2×[-2
+(-
5
)].
3 9
(1)8+(-3)2⨯(-2);(2)100 ÷(-2)2-(-2)÷(-2);3
(3)(-4)÷3
⨯(-3);(4)
1
÷
1 2
-4 ⨯
1 3
.
(-)
4 (-)(-)
3 3
(-)
2
(1)36 ×(1
-
1
2 3
)2;(2)12.7÷(-
8
)⨯ 0 ;
19
(3)4⨯(-3)2+6;(4) 3 ×8 2 1 ;
(-)(-+-)
4 3 3
(5)(-2)3-13÷(-1
);(6)0-23÷(-4)3-
1
;
2 8
(7)(-2)3⨯0.5-(-1.6)2÷(-2)2;(8)3
×[
2 2
2 ];
(-)
2 (-)-
3
(9)[(-3)2-(-5)2]÷(-2);(10)16 ÷(-2)3-(-1
)⨯(-4). 8
(3)(-2)3-32;(4)23 ÷[(-2)3-(-4)];
(5)3 7
÷
7
;(6)(-60)⨯
3 5
;
(-)(-)
4 8 8 (+)4 6
(7)-72+2×(-3)2 +(-6)÷(-1 )2 ;(8) 1 3 4 7 )⨯(-15 ⨯ 4).
3 (--+-
6 20 5 12
(1)8-(-25)÷(-5);(2)-13-2⨯(-1)3;
(5)6+22⨯(-1
);(6)-10+8÷(-2)2 -4×3;5
(7)-15-[(-0.4)⨯(-2.5)]5;(8)(-1)25
1 -(1-0.5)×;
3
(1)(-8)×5-40;
1
(2)(-1.2)÷(- )-(-2);
3
1 3
(3)-20÷5×+5×(-3)÷15;(4)-3[-5+(1-0.2÷)÷(-2)];
4 5
3
3 1 2 2 2
2 5 1 7
(5)-2 ÷1 ×(-1 ) ÷(1 ) ;
(6)- +( - + )×(-2.4)
5 3 3
5 8
6 12
参考答案 1、-1/5 2、-1 3、22 4、9 5、9 6、 0
7、-48 8、-1 9、-15 10、-15/343
11、-24 12、-89 13、3 14、2 15、-20 16、23 17、2 18、24 19、-28 20、9/16 21、1 22、10 23、-1/12 24、104/3 25、9 26、14 27、-31 28、-81 又 1/81 29、-9 30、-29
31、-1/5
32、9
1、【答案】 (1)17; (2) 11
;
(3)31; (4)-11
5
2、【答案】 (1)-10; (2)22; (3)-16;
(4)- 5
2
3、【答案】 (1)1; (2)0; (3)42; (4) 23 ; (5)18; (6)0; (7)-4.64;
4
7 5 (8) ; (9)8; (10)- .
3 2
4、【答案】 (1)22; (2)0; (3)-17; (4)- 23 ; 4 1
(5) ; 7
(6)-95; (7)-85;
(8)6 .
5、【答案】 (1)3; (2)1; (3)-54; (4)0; (5) 26
; (6)-20; (7)-2; (8)-
5
7 . 6
6、【答案】(1)-80; (2)5.6; (3)-2; (4)16; (5)- 16
; (6)-2.9
5
“”
“”
At the end, Xiao Bian gives you a passage. Minand once said, "people who learn to learn are very happy people.". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of continuous learning, "life is diligent, nothing can be gained", only continuous learning can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!。