小升初四则混合运算(带答案)1Word格式.docx
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⑦36×
(+)
7.(2012•天柱县)脱式计算.
3060÷
15﹣25×
1.04
+
(+)×
(÷
5)
[﹣(﹣)].
8.(2012•桃源县)脱式计算.
99×
87+87
18.7﹣3.375﹣6.625
5×
(+0.5)÷
2
[(﹣)÷
].
9.(2012•苏州)计算下面各题,能简算的要简算.
①630÷
18×
24
②0.7+3.9+4.3+6.1
③16×
+4×
④(7.5﹣7.5×
0.6)÷
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÷
40
(2)(3.2÷
16+10.8)÷
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
3.68﹣3.6×
0.2+0.18
48×
9.9+48×
0.1
(1﹣)÷
0.25×
4
(6﹣6×
)÷
12.
(2012•吉水县)脱式计算,能简算的要简算.
97÷
1+35.6+0×
6
1375+450÷
15×
25
[4.5+(13×
+13×
)]÷
+48×
8
94.47﹣(94.47﹣86.555)
3.42×
76.3+76.3×
5.76+9.18×
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
(1)360+240÷
28
(2)6÷
2.4﹣0.3×
1.4
(3)×
6+6×
(4)(﹣0.4)÷
.
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
(4)(+)÷
﹣
(5)3.9×
9.77+0.23×
3.9
(6)+(﹣)×
16.(2011•漳州)计算下面各题,怎样简便就怎样计算.
420÷
216÷
17
25×
12.5×
32
×
40÷
[×
(+)]
17.(2011•游仙区)用自己喜欢的方法算
(315+285)÷
(315﹣255)
5﹣(÷
+)
(+﹣)×
36
3.3×
+0.75×
3.7+75%×
3.
18.(2011•永州)下面各题,怎样简便就怎样计算.
405×
(20﹣172÷
43)
×
17.31﹣6.15﹣3.85
(﹣)].
19.(2011•武昌区)递等式计算:
360﹣225÷
18
4.72﹣1.16﹣2.84
+.
20.(2011•田东县)计算下列各题.
860﹣560÷
8×
7
(5.9+1.65)÷
2.5
20÷
[(+)×
(2011•瑞安市)
(1)360+24÷
30
(2)0.25×
7.2+2.8÷
0.5
29﹣8×
(4)(+﹣)÷
21.(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)
109×
x+109×
x
9.5﹣(4.6+5.8)÷
1.3
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)64﹣15.8﹣14.2
(3)
(4)
(5)
(6)38÷
[2.5×
(4.36+3.64)].
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
3.33×
4.5+4.5×
6.67
25.(2011•河西区)脱式计算.(能简算的要简算)
53×
13+21
1.65×
45+55×
1.65
[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:
2842÷
14+74×
3
(﹣)
3.6×
99+3.6
(×
)
72×
(﹣)
28.(2011•丰都县)脱式计算
(384+336)÷
13
(11+30.6)÷
16+16.5
2﹣×
〔1﹣(+)〕÷
29.(2010•自流井区)计算,能简便的要简便
(73.6÷
0.16+370)×
18
3.84÷
+5.16×
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)
200.8×
73﹣6.3×
2008
118÷
(14+2.5×
45)
99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1
2008÷
200820082009.
31.(2012•咸安区)灵活计算
①
②
③
④.
参考答案:
1.①428÷
(4+4)],
=428÷
8],
4,
=107;
②127×
8,
=127÷
=8×
=64
2.
(1)9080﹣35×
26,
=9080﹣910,
=8170;
(2)17÷
3.4+1.48,
=5+1.48,
=6.48;
(3)÷
(﹣)×
(+),
=÷
,
=×
(×
),
=;
(4)3÷
=9×
=12÷
=3;
(5)(+)÷
+,
=+,
(6)10÷
+)],
=10÷
[﹣(+)],
[﹣],
=81
3.
(1)2004+75×
45,
=2004+4050÷
=2004+90,
=2094;
(2)(0.125×
=(1﹣0.5)×
=0.5×
=2;
(3)32%×
3.2,
=32%×
76.4+13.6×
0.32
=0.32×
(76.4+13.6),
90,
=28.8;
(5)(﹣)×
(+),
(6)1110÷
(﹣)],
=1110÷
﹣56×
],
[24﹣21],
3,
=370
4.
(1)(108÷
18),
=18;
(2)3.5×
4.8),
=3.5×
(20.6﹣3.5),
17.1,
=59.85;
(3)(﹣)×
(+)],
[7﹣4×
[7﹣5],
2,
=.
5.9﹣5.4=3.6,780÷
26=30,
3.14×
3=9.42,27×
=15,
625﹣199=426,10+0.1=10.1,
=0,9.42×
0.1=0.942,
﹣=,0.42=0.16,
1÷
=,1﹣+=;
6.①92×
=1196+28,
=1224;
=2.8﹣0.36,
=2.44;
=(79﹣1)×
=79×
﹣1×
=3﹣,
=4﹣,
5,
=1×
=25;
=2﹣,
=36×
+36×
=6+24,
=30.
7.
(1)3060÷
1.04
=204﹣26,
=178;
(2)×
(3)(+)×
[+﹣],
8.
(1)99×
87+87,
=(99+1)×
87,
=100×
=8700;
(2)18.7﹣3.375﹣6.625,
=18.7﹣(3.375+6.625),
=18.7﹣10,
=8.7;
(3)5×
=5×
=6÷
(4)÷
[÷
9.①630÷
24,
=35×
=840;
②0.7+3.9+4.3+6.1,
=(0.7+4.3)+(6.1+3.9),
=5+10,
=15;
=(16+4)×
=20×
=8;
=(7.5﹣4.5)÷
=3÷
=0.75;
=(+×
)×
=(+)×
=,
⑥[()],
()],
[],
=[],
=1
10.①14×
=1050﹣16,
=1034;
=+×
11.
(1)1379+450÷
40,
=1379+25×
=1379+1000,
=2379;
22,
=(0.2+10.8)÷
=11÷
=0.5;
(﹣),
12,
12×
=3×
12.
(1)800﹣608÷
=800﹣19×
=800﹣95,
=705;
(2)3.68﹣3.6×
0.2+0.18,
=3.68﹣0.72+0.18,
=2.96+0.18,
=3.14;
(3)48×
0.1,
=48×
(9.9+0.1),
10,
=480;
(4)(1﹣)÷
=0.25÷
=4;
(5)(6﹣6×
=(6﹣4)÷
=2÷
13.
(1)97÷
6
=97+35.6+0,
=132.6;
(2)1375+450÷
=1375+30×
25,
=1375﹣750,
=625;
(3)[4.5+(13×
=[4.5+(13×
2)]÷
=[4.5+9.75]÷
=14.25×
=8.55;
(4)48×
8
=(++8)×
48,
=432;
(5)94.47﹣(94.47﹣86.555)
=94.47﹣94.47+86.555,
=0+86.555,
=86.555;
(6)3.42×
23.7
=(3.42+5.76)×
76.3+9.18×
23.7,
=9.18×
=(76.3+23.7)×
9.18,
=918
14.
(1)360+240÷
28,
=360+16×
=360+448,
=808;
1.4,
=2.5﹣0.42,
=2.08;
6,
=6;
15.
(1)43×
15,
=344﹣28,
=316;
(2)+2++3,
=(+)+(3+2),
=1+6,
=7;
﹣,
=﹣,
=3.9×
(9.77+0.23),
=39;
(6)+(﹣)×
16.
(1)420÷
17,
(2)25×
32,
=25×
=(25×
4)×
(12.5×
8),
100,
=10000;
(4)40÷
(+)],
=40÷
=80
17.
(1)(315+285)÷
(315﹣255),
=600÷
60,
=10;
(2)5﹣(÷
+),
=5﹣(4),
=5﹣4﹣,
(3)(+﹣)×
36,
36+×
36﹣×
=9+6﹣12,
(4)3.3×
=(3.3+3.7+3)×
0.75,
=10×
=7.5
18.①405×
43),
=405×
16,
=6480;
②×
③17.31﹣6.15﹣3.85,
=17.31﹣(6.15+3.85),
=17.31﹣10,
=7.31.
(﹣)],
=3
19.
(1)360﹣225÷
18,
=360﹣15×
=360﹣270,
=90;
(2)÷
(3)4.72﹣1.16﹣2.84,
=4.72﹣(1.16+2.84),
=4.72﹣4,
=0.72;
(4)+÷
=++,
=1+,
=1.
20.860﹣560÷
7
=860﹣70×
7,
=860﹣490,
=370;
2.5
=7.55÷
2.5,
=3.02
=(×
20+×
20),
=(15+16)×
=31×
=21;
21.
(1)360+24÷
30,
=360+×
=360+48,
=408;
0.5,
=1.8+5.6,
=7.4;
(29﹣8),
21,
=9;
=(+﹣)×
24+×
24﹣×
=20+21﹣10,
=41﹣10,
=31
22.
(1)109×
x,
=(109+109)×
=218x;
(2)9.5﹣(4.6+5.8)÷
1.3,
=9.5﹣10.4÷
=9.5﹣0.8,
(3),
=.
23.
(1)3600﹣800÷
35,
=3600﹣20×
=3600﹣700,
=2900;
(2)64﹣15.8﹣14.2,
=64﹣(15.8+14.2),
=64﹣30,
=34;
=(40﹣27)×
=13×
(4),
=15﹣6+14,
=9+14,
=23;
(5),
=(18﹣5+1)×
=14×
(4.36+3.64)],
=38÷
20,
=1.9
24.
(1)6760÷
=520+357,
=877;
(2)3.33×
=(3.33+6.67)×
4.5,
=45;
(3)(+)÷
=48.
25.
(1)53×
13+21,
=689+21,
=710;
(2)1.65×
1.65,
=1.65×
(45+55),
=165;
[1﹣(+)],
[1﹣],
26.
(1)25×
=300﹣50,
=250;
99+25%,
=0.25×
(99+1),
(3)6÷
7﹣,
(4)()×
13+×
=+(+),
=+1,
=2.
27.
(1)2842÷
=2848÷
7÷
2+74×
=203+222,
=425;
(﹣)
(3)3.6×
3.6,
=360;
)
(5)×
(6)72×
=72×
﹣72×
=40﹣30,
=10
28.
(1)(384+336)÷
13,
=720÷
=624;
(2)(11+30.6)÷
16+16.5,
=41.6÷
=2.6+16.5,
=19.1;
(3)2﹣×
=2﹣﹣,
=2﹣(+),
=2﹣1,
(4)[1﹣(+)]÷
=[1﹣]÷
29.
(1)(73.6÷
=(460+370)×
=830×
=14940;
(2)3.84÷
=3.84×
=(3.84+5.16)×
=12;
=7.35﹣﹣0.35﹣,
=(7.35﹣0.35)﹣(+),
=7﹣,
(4)2.5×
(+++),
=2.5×
4),
=(2.5×
30.
(1)3618÷
45+1620,
=80.4+1620,
=1700.4;
(2)67﹣67×
(23+19),
=67×
(1﹣23﹣19),
(﹣41),
=﹣2747;
(3)200.8×
2008,
=2008×
7.3﹣6.3×
=(7.3﹣6.3)×
=2008;
(4)118÷
45),
=118÷
(14+112.5),
126.5,
(5)99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1,
=2+2+…2+2,
=2×
=50.
(6)2008÷
200820082009=;
31.
(1),
=﹣+,
=(+),
=1﹣,
(2)75﹣25×
=75×
﹣25×
=(75﹣25)×
=50×
=30;
14+×
14﹣,
=5+(14﹣1)×
=5+13×
=5+4,