小升初四则混合运算(带答案)1.docx
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小升初四则混合运算(带答案)1.docx
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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+1.48
÷(﹣)×(+)
3÷÷÷4
(+)÷+
10÷[﹣(÷+)].
3.(2012•武胜县)计算,能简算的要简算.
2004+75×54÷45
(0.125×8﹣0.5)×4
32%×76.4+1.36×3.2
×+÷
(﹣)×(+)
1110÷[56×(﹣)]
4.(2012•武胜县)计算.
(108÷25)×(75÷18)
3.5×(20.6﹣16.8÷4.8)
(﹣)×(+)
×[7﹣4÷(+)].
5.(2012•万州区)计算:
9﹣5.4=
780÷26=
3.14×3=
27×=
625﹣199=
10+0.1=
0÷=
9.42×0.1=
﹣=
0.42=
1÷=
1﹣+=
6.(2012•桐庐县)计算.
①92×13+28
②4.2÷1.5﹣0.36
③78×
④1÷﹣÷1
⑤×5÷×5
⑥2﹣÷
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÷18×40
(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×+48×+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÷15×28
(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
(3)×÷15
(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÷18×17
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÷15×18
÷×
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÷15×30
(2)0.25×7.2+2.8÷0.5
(3)×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
0.25×99+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)÷15×13
(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÷[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÷3.4+1.48,
=5+1.48,
=6.48;
(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)(0.125×8﹣0.5)×4,
=(1﹣0.5)×4,
=0.5×4,
=2;
(3)32%×76.4+1.36×3.2,
=32%×76.4+13.6×0.32
=0.32×(76.4+13.6),
=0.32×90,
=28.8;
(4)×+÷,
=+,
=;
(5)(﹣)×(+),
=×,
=;
(6)1110÷[56×(﹣)],
=1110÷[56×﹣56×],
=1110÷[24﹣21],
=1110÷3,
=370
4.
(1)(108÷25)×(75÷18),
=×,
=18;
(2)3.5×(20.6﹣16.8÷4.8),
=3.5×(20.6﹣3.5),
=3.5×17.1,
=59.85;
(3)(﹣)×(+),
=×,
=;
(4)×[7﹣4÷(+)],
=×[7﹣4÷],
=×[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÷=0,9.42×0.1=0.942,
﹣=,0.42=0.16,
1÷=,1﹣+=;
6.①92×13+28
=1196+28,
=1224;
②4.2÷1.5﹣0.36
=2.8﹣0.36,
=2.44;
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÷15﹣25×1.04
=204﹣26,
=178;
(2)×÷+
=×+,
=+,
=;
(3)(+)×(÷5)
=××,
=;
(4)×[﹣(﹣)].
=×[+﹣],
=×,
=.
8.
(1)99×87+87,
=(99+1)×87,
=100×87,
=8700;
(2)18.7﹣3.375﹣6.625,
=18.7﹣(3.375+6.625),
=18.7﹣10,
=8.7;
(3)5×(+0.5)÷2,
=5×÷2,
=6÷2,
=3;
(4)÷[(﹣)÷],
=÷[÷],
=÷,
=.
9.①630÷18×24,
=35×24,
=840;
②0.7+3.9+4.3+6.1,
=(0.7+4.3)+(6.1+3.9),
=5+10,
=15;
③16×+4×,
=(16+4)×,
=20×,
=8;
④(7.5﹣7.5×0.6)÷4,
=(7.5﹣4.5)÷4,
=3÷4,
=0.75;
⑤(+÷3)×,
=(+×)×,
=(+)×,
=,
=;
⑥[()],
=×[÷()],
=×[],
=[],
=,
=1
10.①14×75﹣624÷39
=1050﹣16,
=1034;
②÷9+×
=×+×,
=(+)×,
=×,
=;
③+(﹣)÷
=+×,
=+,
=;
④÷[﹣(1﹣)].
=÷[﹣],
=,
=.
11.
(1)1379+450÷18×40,
=1379+25×40,
=1379+1000,
=2379;
(2)(3.2÷16+10.8)÷22,
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)×+×,
=(+)×,
=1×,
=;
(4)×÷(﹣),
=×÷,
=××12,
=×12×,
=3×,
=.
12.
(1)800﹣608÷32×5,
=800﹣19×5,
=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)48×9.9+48×0.1,
=48×(9.9+0
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