小升初——四则混合运算带答案

小升初真题混合运算专项练习（有答案）
1. (2012?瑶海区)基本计算:
①428 - [32 -( 4+4)]
②127X 8- 127 X 8
2. (2012?武胜县)计算.
9080 - 35 X 26 11⑥.口一2）］
15 L6 9 3
10.（2012?顺昌县）脱式计算.（能简算的要简算）
① 14X 75 - 624-39
17-3.4+1.48
JU(」-丄)X(丄+二) 9 2 2 S 2
3^—^—-4
3 4
10-[—-(
27
+丄10 3
3.（2012?武胜县）计算，能简算
的要简
算.
2004+75 X 54 - 45
(0.125 X 8- 0.5 ) X
4
32%X 76.4+1.36 X 3.2
rr^亠
24国1 -卫+Z
7 7
6.( 2012?桐庐县)计算.
①92X13+28
②4.2 - 1.5 - 0.36
③78 X—L
79
④1 -丄-丄-1
4 4
⑤二X 5-上X 5
5 5
⑥2-上-二
15 9
⑦36 X(—心)
6 3
7.( 2012?天柱县)脱式计算.
11. （2012?泉州）用递等式计算
(1) 1379+450- 18X 40
（2）（3.2 - 16+10.8 ）-
22
（3）— X丄X-^-
（4）丄乂丄-（丄-上）
4 7 囤4
（2012?硚口区）脱式计
算. 情提醒：有的可以简算）
800 - 608 - 32 X 5
（
友
1110 - [56 X( 2-上)]
7 8 4. (2012?武胜县)计算. 3060 - 15 - 25 X
1.04 色卫-主+ 丄3 5 5 8
X( 3
10
(108-25)X( 75- 18)
3.5 X( 20.6 - 16.8 -
4.8 )
5. （2012?万州区）计算:
9 -
5.4=
780 -
26=
3.14 X
3=
27X丄
625 -
199=
10+0.1
=
0-
3.68 - 3.6 X 0.2+0.18
48 X 9.9+48 X 0.1
(1 -—)- 0.25 X 4
4
?
(6 - 6X-)- 12.
3
(2012?吉水县)脱式计算，能简
算的要简算.
97 - 1+35.6+0 X 6
黑)].
上X [上-
9 4
8.( 2012?桃源县)脱式计算.
99X 87+87
18.7 - 3.375 - 6.625
(-+0.5 )- 2
4 4
_亠
T ■
（7
3
14
9. （2012?苏州）计算下面各
题,
能简算的要简算.
10 .① 630- 18X 24
②0.7+3.9+4.3+6
.1
9 9
③16 X—+4X —
5 5
7.5 - 7.5 X 0.6 )-
4
1375+450- 15X 25
[4.5+ ( 13X上+13X上)]-丄
8 [^ 3
9 7|
48 X』+48 X—L +48 X 8
16 16|
94.47 -( 94.47 - 86.555 )
3.42 X 76.3+76.3 X 5.76+9.18 X
23.7 .
12.( 2012?洪山区)能简便的要用
简便方法计算，写出主要过程
13.( 1) 360+240- 15X28
(3) X 6+6 X 一 (4)(二-0.4 ) 3 2X
4 15. （2012?凤阳县）用递等式计 算，能简算的要简算
（1）
43 X 8- 420 - 15 (2)
(3) 匸+2 一丄+』 4 17 4 17 3 (4) (5) (二+» 2 3 3.9 X 9.77+0.23 X 3.9 23. 860 - 560- 8X 7 (5.9+1.65 )- 2.5
+_
4 5 亠[(—+ 丄)X |；-；].
5
0.25 X 99+25%
)X 20-一
21 )X 13+4 - 17.
27. 2842 9 3
2
(2011?瑞安市) (1) (2) 360+24- 15X 30 0.25 X 7.2+2.8 -
0.5 (3) (4) （2011?海州区）神机妙算:
-14+74X3
十(
9
3.6 X 99+3.6 _： +(丄X 丄)
4
5 8 1
24
土丄
& g 12
（2011?南县）下面各题, X _丄丄
72X(§-_L
9 12
24.
算的要简算.（能简算的要写出主要
简算过程）
25. 109 X x+109 X x 9.5 -（ 4.6+5.8 ）* 1.3
台匕
佶 冃匕可 益(") 3
X 兰. 3 3
16 . （2011?漳州）计算下面各题, 怎样简便就怎样计算. 420 - 216- 18X 17 (6) 25 X 12.5 X 32
28 . (2011?丰都县)脱式计算 (384+336)- 15X 13
(11+30.6 )- 16+16.5
5- 卜
6 1
12 12 5 X 1 € …-
1
4 15
3
2 - -（2 肖）〕
〔1 40 - [-X(_+_)] n s 2 17 . ( 2011?游仙区)用自己喜欢的 方法算 18. ( 315+285)-( 315 - 255) 二+上) 7 14 13 5-( (丄+2 -丄)
4 3.3 1C
I
-::X 36
38- [2.5 X( 4.36+3.64 ) （1-卫）三
20
23 . （2011?金堂县）用自己喜
欢 的方式计算下面各题（要写出主要 的解答过程）
29. 便的要简便
(73.6 - 0.16+370 )X 18 （2010?自流井区）计算，能简 3.84 十上+5.16
X§
3
匸菟-吕-(0*35+2)
15
lb
X 二+0.75 X 3.7+75%X 3. [4 (2011?永州)下面各题， 19. 简便就怎样计算. 20. 405 X( 20 - 172- 43) 怎样
（6） 24 . （2011?淮南）选择合适的
方 法计算（要写出主要的计算过程）
6760 - 13+17X 21 3.33 X 4.5+4.5 X 6.67
Z
丄X 2
12 9 [9
5 & 3 15
17.31 - 6.15 - 3.85 堆［（托）巒.
2 5卫肆显显）
30 . （2010?雨花区）计算下列
各 题，能简便的要简便计算
3618 - 45+1620 67 - 67X （ 23+19） 200.8 X 73 - 6.3 X 2008
9 10 §」)].
5 10 21 . ( 2011?武昌区)递等式计算: 360 - 225- 15X 18 4.72 - 1.1
6 - 2.84 9 B 4 9 22.（ 2011?田东县）计算下列各题.
25 （ 2011?河西区）脱式计
算. 简算的要简算）
53X 13+21
1.65 X 45+55 X 1.65
〒
[1 -
].
/台匕
冃
匕
26. （2011?河池）用你喜欢的方法 计算.
25 X 12 - 850 - 17
③——：
④爲堆）需*
参考答案:
1. ① 428 - [32 -( 4+4)],
=428 - [32 - 8], =428- 4, =107; ② 127X 8- 127 X 8, =127- 127X 8X 8, =8X 8, =64 2. (1) 9080 - 35X 26, =9080- 910, =8170; (2) 17- 3.4+1.48 ,
=5+1.48 , =6.48 ; 10 81?
（3
）一） X(=忑 3 5
),
⑶f ( X(
丄-), 8^11 =-[X( _：X —), 9 (4) =9X =12- 4, =3; (5)(丄+二) 6 4 =二 X 12 3 47
g
S 9 1
(6) 10-[—-(卫-二+2) 27 —— ——
29
=10-[二-(
2?
],
=10--丄
L 27 S1
10 3
=81
3. ( 1) 2004+75X 54 - 45, =2004+4050 - 45, =2004+90,
=2094;
(2)
=(1 =0.5 (0.125 X 8- 0.5 )X 4, -0.5 )X 4,
X 4, =2;
(3) =32%X 76.4+13.6 X
0.32 32% 76.4+1.36 X 3.2 , =0.32 =0.32 =28.8 (4) =!X
14
=—X [7 - 14 J X [7 - 14
4-_!]
[5
4X2 ]
4
X( 76.4+13.6 ), X 90, 5],
(4) -X = +
24 4
==,
2 4;
X 11.
~;
7- 1)X(
冷),
:-
9 3
(5)( 11
1
(6) 1110- [56 X( 「）］, =
1110
十
[56
亠 56X W ],
=1110 - [24 -
21], =1110-3, =370
4. ( 1) (108- 25)X( 75- 18),
=108X 75 25 18?
=18;
(2)
=3.5
=3.5 3.5 X( 20.6 - 16.8 - 4.8 ), X( 20.6 - 3.5 ),
X 17.1 , =59.85 ;
=—X 2,
14 =：孑 7.
5. 9 - 5.4=3.6 , 780 -26=30, 3.14 X 3=9.42 , 27 X- =15,
9
625 - 199=426 , 10+0.1=10.1 ,
9.42 X
0-— =0, 4 0.仁0.942 ,
1_1
0.4
2
=0.16 ,
s =丄
11 8
1十 1丄匕」;
6 .① 92 X 13+28 =1196+28, =1224; ②4.2 - 1.5 - 0.36
=2.8 - 0.36 , =2.44 ; 79 ③78 X
=(79 - 1)X
=79 X- - 1 X 79
=3
鵲,
西.
i -
1
4
=3 二 4 =4 -
⑤Z X 5+卫X 5 5 5 =厶 _ _X 5 X 5, 5 T 弓 =1 X 5X 5, =25; ⑥ 2- _ + 15 9 =2」 5
⑦ 36 X( 一+=) =36X -L+36X ：, =6+24, =30. 7. (1) 3060 + 15 - 25X 1.04 =204 - 26, =178; b
_!+ _+丄
3 5 5 8 (2) =鼻 2 13 = ;
8; (3)( X = 5) 一仝X 亠二 24 10 电 1EV
J X — 9 IS J
丁
16 4
8. ( 1) 99X 87+87, =(99+1)X 87, =100X87, =8700; (2) 18.7 - 3.375 - 6.625 , =18.7 -( 3.375+6.625 ), =18.7 - 10, =8.7 ;
(3) L X(上+0.5 ) +
5 4
=3;
(4
)一’[
亠一) ⑥* X
［头
d 15
6
9 3
)], 丄］，
=二
15
15' 3
7]
，
_2 二.
9 .① 630+ 18X 24, =35X 24, =840;
② 0.7+3.9+4.3+6.1 , =(0.7+4.3 ) + (6.1+3.9 ), =5+10, =15; ③ 16 X —+4X =(16+4)
=20 X
2 5,
=8；
7.5 -
=(7.5 - 4.5 )+ 4, =3+ 4, =0.75 ;
7.5 X 0.6 )+ 4,
g 20 10
⑤( 十 3
)-,
=(
X
=- X ['■'
+ (1 15
9
=_ X [-「 丄
］ 15 | 6 | 9 =: =15 ■ [- ■ 6
1E
=- =1
10 .① 14 X 75 - 624'39 =1050 -
16, =1034;
4
IT
丄1 +」Xj =(上 £1 )X
7 7|
二 X 二
7 9
二
；
刁;
I
~，
-],
工亠丄
11 ' 10'
="
11
11 . (1) 1379+450+ 18 X
40,
=1379+25X 40, =1379+1000, =2379;
(2) (3.2 ' 16+10.8 )' 22,
=(0.2+10.8 )- 22, =11-22, =1x_,
25
25?
=上
7
12. (1) 800 - 608 - 32x 5,
=800 - 19X 5, =800 - 95, =705;
(2) 3.68 - 3.6 x 0.2+0.18 ,
=3.68 - 0.72+0.18 , =2.96+0.18 , =3.14 ;
(3) 48 X 9.9+48 X 0.1 , =48X( 9.9+0.1 ), =48X10, =480;
(4) (1-丄)十 0.25 X 4,
4
=0.25 - 0.25 X 4, =1 X 4, =4；
(5) (6 - 6Xy)+ 12 , =(6 - 4)- 12, =2 - 12,
U
13. (1) 97- 1+35.6+0 X 6 =97+35.6+0 , =132.6 ;
(2) 1375+450- 15X 25 =1375+30X 25, =1375 - 750, =625;
=14.25 X
5
=8.55 ;
(4) 48X 2+48X-L+48 X 8
16 16 =(JL+2+8)
16
=9X 48, =432; (5) 94.47 - =9.18 X
76.3+9.18 X 23.7 , =(76.3+23.7 )X 9.18 , =100 X 9.18 , =918
14. (1) 360+240- 15X 28, =360+16X 28, =360+448, =808;
(2) 6-2.4 - 0.3 X 1.4 ,
=2.5 - 0.42 , =2.08 ;
3 4
(3) * 6+6X 兰，
7
7
=(-+—) X 6,
7 H
=1X 6, =6;
(4) (——0.4)*亍二， =—亠二止
詞目胃,
二X 丄，
5 4
(3)丄X
7
11 25 + _ )X 7 11 11
25
(4) 1x 1
4
H ），
(3) [4.5+ ( 13X 卫+13X 兰)] =[4.5+ (13X 上X 2)]十
8
=[4.5+9.75]十 !
■
16
X 48,
(94.47 - 86.555 )
=94.47 - 94.47+86.555 ,
=0+86.555 , =86.555 ;
(6) 3.42 X 76.3+76.3 X 5.76+9.18
X 23.7
=3X 1
-,
4 x — =0.
5 ;
=
15
15.(1) 43X 8 -420- 15,
=344 - 28,
=316;
(2) _： +*」+』,
4 17 4 1^
=(卫丄)+ (— +匚),
4 4 17 17
=1+6 ,
=7;
(3)〔X 土十15 ,
9 1^
J X-,
12 15
=_ .
54，
(4)(丄丄)-二—_,
2 3 5 18
戈X5UI
6 3 lg,
IS lg,
_4
(5)3.9 X 9.77+0.23 X 3.9 =3.9 X( 9.77+0.23 ),
=3.9 X 10 ,
=39;
(6M + (上-=)X丄，
斗X二
3 15 3
亠
3 9'
_8
16.(1) 420- 216- 18 X
17 , =-18X 17 ,
13
一X 17 ,
(2) 25X 12.5 X 32 ,
=25 X 12.5 X 8 X 4 , =(25 X 4)X( 12.5 X 8), =100X100,
=10000;
(3) ■lx +5, e 12 12 5 !j , =丄x 6 12 12 61 =( x 丄
一,
-—?
g
③ 17.31 — 6.15 — 3.85 , =17.31 —
( 6.15+3.85 ), =17.31 — 10, =7.31 . =(15+16)x_,
31
=31 x 丄,
31
=1 x _5_ :,
J + [ _! x( E - 6 5 10 =■ 12；=9
=9
x
10
=3
1]
,
=40 + [-x_], 7 3 =40 + =80 17. (1) (315+285) + (315 — 255), =600+60, =10; =丄. 13； (3) (吉-卄36, 36
吕
X 36 - -x 36, =9+6—12, =3； (4) 3.3 x -+0.75 x 3.7+75%x 3,
4 =(3.3+3.7+3 )X 0.7
5 , =10X 0.75 , =7.5 18 .① 405 x( 20 — 172+ 43), =405x16, =6480; !
-' x — ' x 12 g 12 W 12
于x( 19. (1) 360 — 225+ 15x 18,
=360 — 15x 18, =360 —270, =90;
(2) -：+_：x 丄L, 5 6
15 =1 g x 8 =丄.
125’
(3) 4.72 — 1.16 —
2.84 ,
=4.72 —( 1.16+2.84 ), =4.72 — 4,
=0.72 ；
h l 3
9 8
4 9,
(4)
+
：；1
g § 6
=1
4,
=专.
20. 860 — 560 + 8X 7 =860 — 70 x 7, =860 —490, =370;
(5.9+1.65 )+ 2.5 =7.55 + 2.5 , =3.02 u=)
x 20+—
21
二里
:-,
x 20— x
20)
5
=21
；
=:;
亠 二.
=〔；•
■
_ 5 * 3 =_• 25. 21 . (1) 360+24+ 15x 30, =360丄 x 30,
5 =360+48,
=408;
(2) 0.25 x 7.2+2.8 + 0.5 , =1.8+5.6 , =7.4 ;
—x 29 — 8 x_
7
7
(3) =9；
(4) (29— 8), 21, (-十--
—丄)x 24,
=20+21— =41 - 10, =31
)匸,
X
24,
丄x 24
22. (1) 109X x+109X x, =(109+109)x x, =218x; (2) 9.5 —
=9.5 — 10.4 =9.5 — 0.8 , =8.7 ; (4.6+5.8 ) + 1.3 , + 1.3 ,
7
5 10
(3) I 丄
」—+_, 20 5 10 =.
= ------ ,
30 5
亠， 4 10
=仝 2 0 23. (1) 3600— 800- 40X 35, =3600 — 20 X 35, =3600 — 700, =2900;
(2) =64 — (4) 12- : C
12 13
=64 — 64 — 15.8 — 14.2 , (15.8+14.2 ), 30, =34; (3) =(40— 27)X =12十丄，
4
=48.
25. (1) 53X13+21, =689+21,
=710;
(2) =1.65 g =9; =13X (4)(卫, 12 & 1S K| 1 I 7 —X 36 —X 36+— 12 7 ) 乂
36,
1.65 X 45+55X 1.65 ,
X( 45+55), X 100, =165;
(3)丄-[1 —(丄+丄)],
匕-
[1 -
=1.65
12 =15— 6+14, =9+14, =23; ‘X 36, 18 (5)心活YX 洁琲
=(18—5+1)X 「， 26. (1) 25X 12— 850- 17, =300 — 50, =250; (2)
=0.25 = 14X 一, 14 =0.25 =25;
0.25 X 99+25% X( 99+1),
X 100, =—.
Tio
27. (1) 2842 - 14+74X 3 =2848 - 7- 2+74X 3, =203+222, =425;
(2)丄
9
丄 X 12,
g
=1止;
3
(3) 3.6
=(99+1) =100 X
3.6 =360;
(4) 上十
4
X
99+3.6 X 3.6 ,
(5) _X_ 十上
5 7 7 4
二X 亠丄X=,
5 7 7 5
=(
上吟
)X
W ,
=1
X
=9； (6) 38 - [2.5 X( 4.36+3.64 )], =38-[2.5 X 8], =38-20, =1.9 24. (1) 6760- 13+17X 21 , =520+357,
=877; (2) 3.33 X 4.5+4.5 X 6.67 =(3.33+6.67 )X 4.5 , =10X 4.5 , =45; (3)(
(3) 6十7 ----
6_ 4
~ 一,
(4)
厂―13+ 17,
j 13+4- 17
,
13 13 4 10 10 17
X
13+-
=十(
_+_
=丄 10 10
),
(6) 72X(1：-丄)
9 12
5
正， =72 X 上—72 X
9 =40— 30, =10
28. (1) (384+336)- 15X 13,
=720- 15 X 13, =48X13, =624;
(2) (11+30.6 )- 16+16.5 , =41.6 - 16+16.5 , =2.6+16.5 ,
=19.1 ; (3) 2
=25 " 4
),
=2-(二+_),
3 3
=2 - 1, =2； =[1 - (4) [1 -(
-] 一节十丁 12 10 =・ 6 29. (1) ( 73.6 - 0.16+370 )X 18,
=(460+370)X 18, =830X18, =14940;
(2) 3.84 十兰+5.16 X),
4 3 |4 4 =3.84 X -+5.16 X —, =1700.4 ;
(2) 67- 67X( 23+19),
=67 X( 1 - 23 - 19), =67X(- 41), =-2747;
(3) 200.8 X 73 - 6.3 X 2008, =2008 X 7.3 - 6.3 X 2008 , =(7.3 - 6.3 )X 2008 , =1X 2008 , =2008;
(4) 118-( 14+2.5 X 45), =118 -( 14+112.5 ), =118 - 126.5 ,
=__.
■':;
(5) 99 - 97+95 - 93+91 -
89+…+7 -5+3 - 1, =2+2+…2+2, =2X 25 , =50.
(6) 2008- 2008
=(3.84+5.16 )X _, 3 =9X 3 200820082009=-
20052008200^
31. (1) - I-丄)
3
5 3
=12；
(3) 一. I 15
15
=_-_+=
3 5\3
=(丄+上)
3 3
=7.35 - 匸-。

35 - 15
=(7.35 - 0.35 ) 丄丄 15 15 )
,
=7 - 8_ 二, (2) 75
- 25X
」
5
=6_; =75X —- 25X 上
5 厂
(4) 2.5 X(》+上 g 3
=(75 - 25)X 主,
E>
=5+13X_ ,
13
=5+4 , =9； (4)-
12 36 3 6
1S 3「
=+丨
= ■
12 6 =4
=(2・
5 X 4)
运,
=30; (3)
=10X 15 T 14+' 丄X 14-丄,
13 13 30. (1) 3618十45+1620,
=80.4+1620 , =5+ (14- 1)X
A
13?
=50
肩,。