小升初——四则混合运算(带答
案)1(总12页)
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小升初——四则混合运算(带答案)
1.(2012?瑶海区)基本计算: ①428÷[32÷(4+4)] ②127×8÷127×8
2.(2012?武胜县)计算. 9080﹣35×26 17÷+ ÷( ﹣)×( +) 3÷÷÷4
(+)÷+
10÷[
﹣( ÷
+)].
3.(2012?武胜县)计算,能简算的要简算.
2004+75×54÷45 (×8﹣)×4 32%×+× ×
+÷ ( ﹣
)×( +)
1110÷[56×( ﹣)] 4.(2012?武胜县)计算. (108÷25)×(75÷18) ×(﹣÷)
( ﹣)×( +) ×[7﹣4÷(
+)].
5.(2012?万州区)计算: 9﹣= 780÷26= ×3= 27×= 625﹣199= 10+=
0÷= ×=
﹣= =
1÷= 1﹣+=
6.(2012?桐庐县)计算. ①92×13+28 ②÷﹣ ③78×
④1÷﹣÷1 ⑤×5÷×5
⑥2﹣
÷
⑦36×(+)
7.(2012?天柱县)脱式计算. 3060÷15﹣25× ×÷+ (+)×(÷5) ×[﹣(
﹣)].
8.(2012?桃源县)脱式计算. 99×87+87 ﹣﹣
5×(+)÷2 ÷[(﹣
)÷].
9.(2012?苏州)计算下面各题,能简算的要简算. 10.①630÷18×24 ②+++ ③16×+4× ④(﹣×)÷4 ⑤(+
÷3)×
⑥.
10.(2012?顺昌县)脱式计算.(能简算的要简算) ①14×75﹣624÷39 ②÷9+×
③+(﹣)÷ ④
÷[﹣(1﹣
)].
11.(2012?泉州)用递等式计算 (1)1379+450÷18×40 (2)(÷16+)÷22 (3)
×
+
×
(4)×÷( ﹣ )
(2012?硚口区)脱式计
算.(友情提醒:有的可以简算) 800﹣608÷32×5 ﹣×+ 48×+48× (1﹣)÷×4 (6﹣6×)÷12.
(2012?吉水县)脱式计算,能简算的要简算.
97÷1++0×6
1375+450÷15×25 [+(13×+13×)]÷
48×
+48×
+48×8 ﹣(﹣) ×+×+×.
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÷15×28
(2)6÷﹣× (3)×6+6×
(4)(﹣)÷×. 15.(2012?凤阳县)用递等式计算,能简算的要简算 (1)43×8﹣420÷15 (2)+2++3
(3)×
÷15
(4)(+)÷﹣
(5)×+×
(6)+(﹣)×. 16.(2011?漳州)计算下面各题,怎样简便就怎样计算. 420÷216÷18×17 25××32
×+
÷
40÷[×(+)]
17.(2011?游仙区)用自己喜欢的方法算
18.(315+285)÷(315﹣255)5﹣(÷
+
) (+﹣)×36 ×+×+75%×3.
19.(2011?永州)下面各题,怎样简便就怎样计算.
20. 405×(20﹣172÷43)
×+
×
﹣﹣ ÷[×(﹣
)].
21.(2011?武昌区)递等式计算:
360﹣225÷15×18 ÷×
﹣﹣ +÷+.
22.(2011?田东县)计算下列各题.
23. 860﹣560÷8×7 (+)÷ (+)×20÷
÷[(+)×].
(2011?瑞安市)
(1)360+24÷15×30 (2)×+÷ (3)×29﹣8× (4)(+﹣
)÷
.
24.(2011?南县)下面各题,能简算的要简算.(能简算的要写出主要简算过程)
25. 109×x+109×x ﹣(+)÷
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)
(1)3600﹣800÷40×35 (2)64﹣﹣ (3) (4) (5)
(6)38÷[×(+)].
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+17×21 ×+×
.
25.(2011?河西区)脱式计算.(能简算的要简算) 53×13+21 ×45+55×
÷[1﹣(+)].
26.(2011?河池)用你喜欢的方法计算.
25×12﹣850÷17 ×99+25% 6÷7﹣
( )×13+4÷17.
27.(2011?海州区)神机妙
算:
3
2842÷14+74×3 ÷( ﹣) ×99+
÷( ×) ×+÷ 72×(﹣
)
28.(2011?丰都县)脱式计算 (384+336)÷15×13 (11+)÷16+ 2﹣×
﹣
〔1﹣(+)〕÷
.
29.(2010?自流井区)计算,能简便的要简便 (÷+370)×18 ÷+×
.
30.(2010?雨花区)计算下列各题,能简便的要简便计算 3618÷45+1620 67﹣67×(23+19) ×73﹣×2008 118÷(14+×45)
99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1
2008÷2009.
31.(2012?咸安区)灵活计算 ①
②
③
④
.
参考答案:
1.①428÷[32÷(4+4)], =428÷[32÷8], =428÷4, =107;
②127×8÷127×8, =127÷127×8×8, =8×8, =64
2.(1)9080﹣35×26, =9080﹣910, =8170;
(2)17÷+, =5+, =;
(3)÷(﹣)×(+),=÷×, =×(×),
=×,
=
;
(4)3÷÷÷4, =9×÷4, =12÷4, =3;
(5)(+)÷+, =×,
=+, =
;
(6)10÷[﹣( ÷
+)],=10÷[﹣(+)], =10÷[
﹣
],
=10÷,
=81
3.(1)2004+75×54÷45, =2004+4050÷45, =2004+90, =2094;
(2)(×8﹣)×4, =(1﹣)×4, =×4, =2;
(3)32%×+×, =32%×+× =×(+), =×90, =; (4)×+÷,
=+, =
;
(5)( ﹣)×( +), =×,
=
;
(6)1110÷[56×( ﹣)], =1110÷[56×﹣56×], =1110÷[24﹣21], =1110÷3, =370
4.(1)(108÷25)×(75÷18),=
×
,
=18;
(2)×(﹣÷), =×(﹣), =×, =;
5
(3)(﹣)×(+), =×,
=
;
(4)×[7﹣4÷(
+)],
=×[7﹣4÷], =×[7﹣4×], =×[7﹣5], =
×2,
=.
5.9﹣=, 780÷26=30, ×3=, 27×=15, 625﹣199=426, 10+=, 0÷=0, ×=, ﹣=, =, 1÷
=
, 1﹣+=;
6.①92×13+28 =1196+28, =1224; ②÷﹣ =﹣, =; ③78×
=(79﹣1)×,
=79×﹣1×,
=3﹣,
=2
;
④1÷﹣÷1 =4﹣, =3; ⑤×5÷×5 =
×5×5,
=1×5×5, =25; ⑥2﹣
÷
=2﹣, =;
⑦36×(+) =36×+36×, =6+24, =30.
7.(1)3060÷15﹣25× =204﹣26, =178;
(2)×÷+ =×+, =+, =
;
(3)(+)×(
÷5)=
×
×,
=
; (4)×[﹣(
﹣)].6
=×[+﹣],
=×,
=.
8.(1)99×87+87, =(99+1)×87, =100×87, =8700;
(2)﹣﹣, =﹣(+), =﹣10, =;
(3)5×(+)÷2, =5×÷2,
=6÷2, =3; (4)÷[(﹣
)÷],=÷[÷], =
÷,
=.
9.①630÷18×24, =35×24, =840; ②+++,
=(+)+(+), =5+10, =15;
③16×+4×, =(16+4)×,
=20×,
=8;
④(﹣×)÷4, =(﹣)÷4, =3÷4, =; ⑤(+
÷3)×, =(+×)×, =(+)×, =,
=; ⑥[(
)],=
×[÷()],
=
×[], =[], =
, =1
10.①14×75﹣624÷39 =1050﹣16, =1034; ②÷9+× =×+×, =(+)×, =×, =;
③+(﹣)÷
=+
×,
7
=+, =; ④÷[﹣(1﹣)].
=÷[﹣
],
=,
=
.
11.(1)1379+450÷18×40,=1379+25×40, =1379+1000, =2379;
(2)(÷16+)÷22, =(+)÷22, =11÷22, =; (3)×
+
×,
=(+)×,
=1×,
=
; (4)×÷( ﹣ ), =×÷
,
=××12, =×12×, =3×,
=.
12.(1)800﹣608÷32×5,=800﹣19×5, =800﹣95, =705;
(2)﹣×+, =﹣+, =+, =;
(3)48×+48×, =48×(+), =48×10, =480;
(4)(1﹣)÷×4, =÷×4, =1×4, =4;
(5)(6﹣6×)÷12, =(6﹣4)÷12, =2÷12, =.
13.(1)97÷1++0×6 =97++0, =;
(2)1375+450÷15×25 =1375+30×25, =1375﹣750, =625;
(3)[+(13×+13×)]÷=[+(13××2)]÷, =[+]÷, =×, =; (4)48×
+48×
+48×8
=(
++8)×48,
=9×48, =432;
(5)﹣(﹣) =﹣+, =0+,
8
=;
(6)×+×+× =(+)×+×, =×+×, =(+)×, =100×, =918
14.(1)360+240÷15×28, =360+16×28, =360+448, =808;
(2)6÷﹣×, =﹣, =;
(3)×6+6×, =(+)×6, =1×6, =6;
(4)(﹣)÷×, =
÷×,
=×,
=
15.(1)43×8﹣420÷15, =344﹣28, =316; (2)+2
++3
, =(+)+(3+2),
=1+6, =7; (3)×÷15,
=×,
=
;
(4)(+)÷﹣,
=×﹣, =
﹣
,
=; (5)×+× =×(+), =×10, =39;
(6)+(﹣)×, =+
×,
=+, =.
16.(1)420÷216÷18×17,=÷18×17, =
×17, =
;
(2)25××32, =25××8×4,
=(25×4)×(×8), =100×100, =10000; (3)×
+
÷,
=×+×, =(+)×
,
=1×
,
=
; (4)40÷[×(+)],
9
=40÷[×], =40÷, =80
17.(1)(315+285)÷(315﹣255), ===3
÷[××
,
],
19.(1)360﹣225÷15×18, =600÷60, =10; (2)5﹣(÷+
),
=5﹣(4),
=5﹣4﹣,
=
;
(3)(+﹣)×36, =×36+×36﹣×36, =9+6﹣12, =3;
(4)×+×+75%×3, =(++3)×, =10×, =
18.①405×(20﹣172÷43), =405×16, =6480; ②
×+
×, =×(+),
=;
③﹣﹣, =﹣(+), =﹣10, =. ④
÷[×(﹣
)],
=360﹣15×18, =360﹣270, =90; (2)÷×,
=
×,
=
;
(3)﹣﹣, =﹣(+), =﹣4, =;
(4)+÷+, =++, =++, =1+, =1.
20.860﹣560÷8×7 =860﹣70×7, =860﹣490, =370; (+)÷ =÷, =
(+)×20÷
=(×20+×20),
=(15+16)×
,
10
=31×,
=21;
÷[(+)×]. =÷[×],
=, =
.
21.(1)360+24÷15×30,=360+×30, =360+48, =408;
(2)×+÷, =+, =;
(3)×29﹣8×,
=×(29﹣8), =×21, =9; (4)(+﹣)÷
,=(+﹣
)×24,
=×24+×24﹣×24,
=20+21﹣10, =41﹣10, =31
22.(1)109×x+109×x,=(109+109)×x, =218x;
(2)﹣(+)÷, =﹣÷, =﹣, =;
(3),
=÷+,
=+
, =
.
23.(1)3600﹣800÷40×35, =3600﹣20×35, =3600﹣700, =2900;
(2)64﹣﹣, =64﹣(+), =64﹣30, =34; (3),
=(40﹣27)×,
=13×
,
=9; (4),
=
×36﹣×36+
×36,
=15﹣6+14, =9+14, =23; (5)
,
=(18﹣5+1)×,
=14×
,
=9;
(6)38÷[×(+)], =38÷[×8], =38÷20, =
24.(1)6760÷13+17×21, =520+357, =877;
11
(2)×+× =(+)×, =10×, =45;
(3)(+)÷(﹣)
=,
=
;
(4)=12÷[
×
], =12÷,
=48.
25.(1)53×13+21, =689+21, =710;
(2)×45+55×, =×(45+55), =×100, =165;
(3)÷[1﹣(+)], =÷[1﹣], =,
=.
26.(1)25×12﹣850÷17, =300﹣50, =250;
(2)×99+25%, =×(99+1), =×100, =25; (3)6÷7﹣,
=﹣,
=; (4)()×13+4÷17, =×13+×13+4÷17, =++, =+(+
),
=+1, =2
. 27.(1)2842÷14+74×3 =2848÷7÷2+74×3, =203+222, =425;
(2)÷( ﹣) =×12, =10; (3)×99+ =(99+1)×, =100×, =360;
(4)÷( ×) =×,
=
;
(5)×+÷ =×+×, =(+)×, =1×, =;
12
(6)72×(﹣) =72×﹣72×
,
=40﹣30, =10
28.(1)(384+336)÷15×13, =720÷15×13, =48×13, =624;
(2)(11+)÷16+, =÷16+, =+, =; (3)2﹣×﹣,
=2﹣﹣, =2﹣(+), =2﹣1, =2;
(4)[1﹣(+)]÷,
=[1﹣]÷,
=
÷
,
=.
29.(1)(÷+370)×18, =(460+370)×18, =830×18, =14940; (2)÷+×, =×+×, =(+)×, =9×, =12;
(3),
=﹣
﹣﹣
, =(﹣)﹣(+
),
=7﹣, =6
;
(4)×(+++), =×(×4), =(×4)×, =10×, =
.
30.(1)3618÷45+1620, =+1620, =;
(2)67﹣67×(23+19), =67×(1﹣23﹣19), =67×(﹣41), =﹣2747;
(3)×73﹣×2008, =2008×﹣×2008, =(﹣)×2008, =1×2008, =2008;
(4)118÷(14+×45), =118÷(14+), =118÷, =
;
(5)99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1,
=2+2+…2+2, =2×25, =50.
(6)2008÷2009=
;
13
31.(1),
=﹣+, =(+),
=1﹣, =; (2)75
﹣25×, =75×﹣25×, =(75﹣25)×, =50×, =30; (3),=
×14+
×14﹣
,
=5+(14﹣1)×,
=5+13×,
=5+4, =9; (4),
=÷+, =+,
=
14
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