300道分数混合运算1有答案.docx
《300道分数混合运算1有答案.docx》由会员分享,可在线阅读,更多相关《300道分数混合运算1有答案.docx(58页珍藏版)》请在冰豆网上搜索。
300道分数混合运算1有答案
分数混合运算1
一.计算题(共50小题)
1.计算下面各题,能简算的要写出简算过程.
×32×
12×[(﹣)×3]
÷50+÷
×2014﹣×2015
﹣(+)﹣
×+×
2.计算.
8﹣×÷4÷+×4×(÷+)60×(﹣+)
3.直接写出得数.
+=
×17×4=
÷=
10﹣=
2÷1%﹦
8÷=
×2÷2×=
100÷1%=
12×(+)=
×99+=
4.直接写出计算结果
1%﹣%=
×5=
﹣(﹣)=
+﹣+=
÷÷×=
×÷×=
48×+3÷7=
+++++=
5.下面各题怎样算简便就怎样算.
+﹣+
6÷﹣÷6
(+﹣)÷
×﹣÷13
﹣×
×[÷(﹣)]
6.计算下面各题打星号的要简算.
×﹣÷23
×[÷(﹣)]
※(+)×29×23
※×+÷5+.
7.正确合理地计算下面各题
÷×(﹣)
7﹣(2+1)×
15﹣﹣
2×+7×9
××250
3×+7÷9×5+÷.
8.脱式计算(能简算的要简算,并写出主要过程)
1125﹣997
109×101
(+++)×25
×﹣×
(+﹣)÷
[﹣(+)]×.
9.下面各题,怎样算简便就怎样算
﹣×
(+)÷
+×+
21÷(+)÷
×﹣÷
×[÷(﹣)].
10.脱式计算,能简算的要简算.
①×8÷×8
②﹣﹣
③24×(+﹣)
④×[﹣(﹣)].
11.用你喜欢的方法计算.
①+++
②(++)×36
③2﹣×
④(+)÷﹣.
12.用你喜欢的方法计算下面各题.
﹣+﹣
(+)×8+
[﹣(﹣)]÷
×+×
(++)×72
+++.
13.脱式计算(能简便的要用简便方法计算)
(1)36+64×85+15
(2)×9×25
(3)61×40%+38×+
(4)2475÷45+2475÷55
(5)(15﹣14×)×
(6)+﹣+.
14.选择合适的方法计算.
×+÷
×99+
(+)÷
÷[×(+)].
15.计算下面各题.
105×(++)
(3618÷18﹣145)×29
﹣÷(+)
﹣+﹣.
16.用你喜欢的方法计算.
①﹣+﹣
②(++)×36
③2﹣×
④(+)÷﹣.
17.能用简便方法的要用简便方法.
(+×)÷
[﹣(﹣)]÷
(+)××
×﹣×25%
﹣﹣(﹣)
×+×+×981.
18.脱式计算.
(+)×24
67÷÷
68×35﹣408÷24
÷×
(﹣50%)÷(×42)
(+)÷×.
19.直接写出得数
+=
10÷=
÷=
a×=
×=
××=
8×+8×=
55×÷=
×÷×=
0×+=
20.用递等式计算.
÷×
(1﹣×)÷
48048÷12+88
9÷(﹣)×3.
21.能简便计算的要用简便方法计算.
﹣(+)
+++
3﹣﹣
+++.
22.计算下面各题,能够简算的要简算.
×21×
(﹣)×12
×2+×2
16×25%+16×.
23.直接写出得数.
××8=
100﹣99%=
÷=
×=
﹣×0=
3×÷3×=
+8=
÷=
24.直接写出得数.
+=
×+=
2×32=
×4%=
÷=
5﹣5×=
60%×=
×(﹣)=
25.计算下面各题,能简算的要简算.
(15﹣14×)×
101×
×﹣÷.
26.计算,能简便的要简便计算
×+÷6
÷+÷
×+×
(+﹣)×24
÷5+5÷
56×.
27.直接写得数
×16=
12÷=
0×+=
×÷×=
+﹣+
28×(+)=
28.计算
(1+0÷)÷
+8+
×.
29.能简算的要简算.
+++
×
45×21﹣50×
+++
++﹣
﹣(﹣)
××80×
×+×.
30.计算下面各题,能用简便算法的要用简便算法.
(1)×÷
(2)﹣÷×
(3)÷+×
(4)20÷〔(+)×〕
31.计算下面各题.
39××
﹣+
×+
1÷(÷)
(﹣)×24
÷[(﹣)÷].
32.
直接写出得数.
×0×6=
5﹣=
+×2=
×÷×=
9π=
6÷26=
50%﹣=
÷20%=
2+30%=
:
6=
33.下面各题怎样简便就怎样算.
×99+
105×(+)
﹣﹣
+×﹣
+×+
×18﹣.
34.计算下面各题,能简算的要简算
﹣(+)
++
+﹣
﹣﹣
6﹣(﹣)
﹣++
﹣(﹣)
+﹣+.
35.
直接写出得数.
×20%=
×12=
﹣=
1÷×=
:
=
=
÷=
×3÷×3=
36.下面各题,怎样算简便就怎么算
÷15×
÷(﹣)×
+÷
×+÷8.
37.能简算的要简算.
+++
﹣(+)
+++
4﹣﹣.
38.脱式计算(写出必要的计算过程,能简算的要简算)
(1)
(2)
(3)
(4)
(5)
(6).
39.计算下面各题,能简算的要简算
1﹣÷﹣
3+×÷
÷(﹣)×
[1÷(+)]
×+÷
++.
40.计算(写出计算过程)
+﹣
1﹣(+)
×
÷6.
32×.
÷.
41.脱式计算
(﹣)×24
15÷15×
2÷(+)
42.直接写得数.
1÷=
÷2=
×4=
﹣×=
÷=
9÷=
×3=
×=
43.脱式计算
﹣﹣
+﹣
(1﹣(+)
÷[×(﹣)].
44.用递等式计算.
①×+÷
②+÷
③(2+)÷(2﹣)
④÷[×(+)].
45.下面各题怎样简便就怎样算.
÷×
÷×÷
×+×
×99+
(+)×32
17×.
46.下面各题写出必要的计算过程
××
×4÷
÷÷.
47.计算下面各题.
××
4×÷
﹣+﹣
(+)×21.
48.怎样简便就怎样算.
﹣÷
×35+65÷4
(+)÷
25﹣÷
÷3×
(+÷)×.
49.计算下面各题,怎样简便就怎样算
×÷
×7+×11
×99+
÷÷
(+)÷
48×
50.计算题
(1)×
(2)12×(﹣)
(3)×5÷×5
(4)+÷()
分数混合运算1
参考答案与试题解析
一.计算题(共50小题)
1.计算下面各题,能简算的要写出简算过程.
×32×
12×[(﹣)×3]
÷50+÷
×2014﹣×2015
﹣(+)﹣
×+×
【解答】解:
(1)×32×
=×(4×8)×
=(×8)×(4×)
=100×1
=100;
(2)12×[(﹣)×3]
=12××3﹣12××3]
=66﹣24
=42;
(3)÷50+÷
=×+×
=×+×
=(+)×
=1×
=;
(4)×2014﹣×2015
=×(2014﹣2015)
=×(﹣1)
=﹣;
(5)﹣(+)﹣
=﹣﹣﹣
=(﹣)﹣(+)
=12﹣10
=2;
(6)×+×
=×+×
=(+)×
=10×
=.
2.计算.
8﹣×÷4÷+×4×(÷+)60×(﹣+)
【解答】解:
(1)8﹣×÷4
=8﹣÷4
=8﹣
=7;
(2)÷+×4
=3+
=;
(3)×(÷+)
=×(+)
=×
=;
(4)60×(﹣+)
=60×﹣60×+60×
=45﹣40+24
=5+24
=29.
3.直接写出得数.
+=
×17×4=
÷=
10﹣=
2÷1%﹦
8÷=
×2÷2×=
100÷1%=
12×(+)=
×99+=
【解答】解:
+=
×17×4=17
÷=12
10﹣=
2÷1%﹦200
8÷=10
×2÷2×=
100÷1%=10000
12×(+)=5
×99+=90
4.直接写出计算结果
1%﹣%=
×5=
﹣(﹣)=
+﹣+=
÷÷×=
×÷×=
48×+3÷7=
+++++=
【解答】解:
1%﹣%=%
×5=
﹣(﹣)=
+﹣+=
÷÷×=
×÷×=
48×+3÷7=21
+++++=
5.下面各题怎样算简便就怎样算.
+﹣+
6÷﹣÷6
(+﹣)÷
×﹣÷13
﹣×
×[÷(﹣)]
【解答】解:
(1)+﹣+
=(+)﹣(﹣)
=17﹣5
=12;
(2)6÷﹣÷6
=10﹣
=9;
(3)(+﹣)÷
=(+﹣)×12
=×12+×12﹣×12
=3+2﹣4
=1;
(4)×﹣÷13
=×﹣×
=(﹣)×
=×
=;
(5)﹣×
=﹣
=;
(6)×[÷(﹣)]
=×[÷]
=×
=4.
6.计算下面各题打星号的要简算.
×﹣÷23
×[÷(﹣)]
※(+)×29×23
※×+÷5+.
【解答】解:
①×﹣÷23
=﹣
=
②×[÷(﹣)]
=×[÷()]
=×[]
=×[×12]
=×
=4
③(+)×29×23
=×29×23+×29×23
=46+87
=133
④×+÷5+
=×+×
=(+1)×
=2×
=
7.正确合理地计算下面各题
÷×(﹣)
7﹣(2+1)×
15﹣﹣
2×+7×9
××250
3×+7÷9×5+÷.
【解答】解:
(1)÷×(﹣)
=÷×
=×
=;
(2)7﹣(2+1)×
=7﹣3×
=7﹣2
=5;
(3)15﹣﹣
=15﹣(+)
=15﹣10
=5;
(4)2×+7×9
=2×+7×
=(2+7)×
=10×
=;
(5)××250
=×(×)×250
=(×)×(×250)
=1×100
=100;
(6)3×+7÷9×5+÷
=3×+×5+
=(3+5+1)×
=9×
=7.
8.脱式计算(能简算的要简算,并写出主要过程)
1125﹣997
109×101
(+++)×25
×﹣×
(+﹣)÷
[﹣(+)]×.
【解答】解:
(1)1125﹣997
=1125﹣(1000﹣3)
=1125﹣1000+3
=125+3
=128;
(2)109×101
=109×(100+1)
=109×100+109×1
=10900+109
=11009;
(3)(+++)×25
=(×4)×25
=×(4×25)
=×100
=160;
(4)×﹣×
=×﹣×
=(﹣)×
=×
=;
(5)(+﹣)÷
=(+﹣)×36
=×36+×36﹣×36
=16+30﹣14
=46﹣14
=32;
(6)[﹣(+)]×
=[﹣]×
=×
=.
9.下面各题,怎样算简便就怎样算
﹣×
(+)÷
+×+
21÷(+)÷
×﹣÷
×[÷(﹣)].
【解答】解:
(1)﹣×
=﹣
=;
(2)(+)÷
=÷
=;
(3)+×+
=++
=+(+)
=+1
=1;
(4)21÷(+)÷
=21÷÷
=21÷(×)
=21÷
=35;
(5)×﹣÷
=×﹣×
=×(﹣)
=×1
=;
(6)×[÷(﹣)]
=×[÷]
=×
=.
10.脱式计算,能简算的要简算.
①×8÷×8
②﹣﹣
③24×(+﹣)
④×[﹣(﹣)].
【解答】解:
①×8÷×8
=(÷)×(8×8)
=1×64
=64;
②﹣﹣
=﹣(+)
=﹣9
=;
③24×(+﹣)
=24×+24×﹣24×
=6+20﹣21
=26﹣21
=5;
④×[﹣(﹣)]
=×[﹣+]
=×[+﹣]
=×[1﹣]
=×
=.
11.用你喜欢的方法计算.
①+++
②(++)×36
③2﹣×
④(+)÷﹣.
【解答】解:
①+++
=(+)+(+)
=11+10
=21;
②(++)×36
=×36+×36+×36
=9+6+15
=15+15
=30;
③2﹣×
=2﹣
=;
④(+)÷﹣
=÷﹣
=﹣
=.
12.用你喜欢的方法计算下面各题.
﹣+﹣
(+)×8+
[﹣(﹣)]÷
×+×
(++)×72
+++.
【解答】解:
(1)﹣+﹣
=(+)﹣(+)
=40﹣20
=20;
(2)(+)×8+
=(×8+×8)+
=3++
=3+(+)
=3+1
=4;
(3)[﹣(﹣)]÷
=[﹣]÷
=÷
=;
(4)×+×
=×(+)
=×3
=;
(5)(++)×72
=×72+×72+×72
=30+8+27
=65;
(6)+++
=(+)+(+)
=1+1
=2.
13.脱式计算(能简便的要用简便方法计算)
(1)36+64×85+15
(2)×9×25
(3)61×40%+38×+
(4)2475÷45+2475÷55
(5)(15﹣14×)×
(6)+﹣+.
【解答】解:
(1)36+64×85+15
=36+5440+15
=5476+15
=5491;
(2)×9×25
=×25×9
=10×9
=90;
(3)61×40%+38×+
=61×+38×+
=(61+38+1)×
=100×
=40;
(4)2475÷45+2475÷55
=55+45
=100;
(5)(15﹣14×)×
=(15﹣8)×
=7×
=;
(6)+﹣+
=(﹣)+(+)
=1+10
=11.
14.选择合适的方法计算.
×+÷
×99+
(+)÷
÷[×(+)].
【解答】解:
(1)×+÷
=+
=;
(2)×99+
=×(99+1)
=×100
=16;
(3)(+)÷
=÷
=28;
(4)÷[×(+)]
=÷[×]
=÷
=.
15.计算下面各题.
105×(++)
(3618÷18﹣145)×29
﹣÷(+)
﹣+﹣.
【解答】解:
(1)105×(++)
=105×+105×+105×
=15+70+42
=127;
(2)(3618÷18﹣145)×29
=(201﹣145)×29
=56×29
=1624;
(3)﹣÷(+)
=﹣÷
=﹣9
=;
(4)﹣+﹣
=(+)﹣(+)
=20﹣11
=9.
16.用你喜欢的方法计算.
①﹣+﹣
②(++)×36
③2﹣×
④(+)÷﹣.
【解答】解:
①﹣+﹣
=(+)﹣(+)
=40﹣20
=20
②(++)×36
=×36+×36+×36
=9+6+15
=30
③2﹣×
=2﹣
=1
④(+)÷﹣
=÷﹣
=﹣
=
17.能用简便方法的要用简便方法.
(+×)÷
[﹣(﹣)]÷
(+)××
×﹣×25%
﹣﹣(﹣)
×+×+×981.
【解答】解:
(1)(+×)÷
=(+)÷
=÷
=;
(2)[﹣(﹣)]÷
=[﹣+]÷
=[+﹣]÷
=[1﹣]÷
=÷
=;
(3)(+)××
=××+××
=+
=4;
(4)×﹣×25%
=×﹣×
=(﹣)×
=×
=;
(5)﹣﹣(﹣)
=﹣﹣+
=(+)﹣(+)
=7﹣3
=4;
(6)×+×+×981
=×+5×+×
=×(+5+)
=×10
=.
18.脱式计算.
(+)×24
67÷÷
68×35﹣408÷24
÷×
(﹣50%)÷(×42)
(+)÷×.
【解答】解:
(1)(+)×24
=×24+×24
=20+9
=29;
(2)67÷÷
=67÷(×)
=67÷1
=67;
(3)68×35﹣408÷24
=2380﹣17
=2363;
(4)÷×
=××
=4×
=7;
(5)(﹣50%)÷(×42)
=(﹣)÷(×42)
=÷30
=;
(6)(+)÷×
=÷×
=74×
=37.
19.直接写出得数
+=
10÷=
÷=
a×=
×=
××=
8×+8×=
55×÷=
×÷×=
0×+=
【解答】解:
+=
10÷=25
÷=
a×=b
×=
××=
8×+8×=4
55×÷=40
×÷×=
0×+=
20.用递等式计算.
÷×
(1﹣×)÷
48048÷12+88
9÷(﹣)×3.
【解答】解:
(1)÷×
=×
=2;
(2)(1﹣×)÷
=(1﹣)÷
=÷
=;
(3)48048÷12+88
=4004+88
=4092;
(4)9÷(﹣)×3
=9÷×3
=81×3
=243.
21.能简便计算的要用简便方法计算.
﹣(+)
+++
3﹣﹣
+++.
【解答】解:
(1)﹣(+)
=﹣﹣
=1﹣
=;
(2)+++
=(+)+(+)
=2+1
=3;
(3)3﹣﹣
=3﹣(+)
=3﹣1
=1;
(4)+++
=(1﹣)+(﹣)+(﹣)+(﹣)
=1﹣+﹣+﹣+﹣
=1﹣
=.
22.计算下面各题,能够简算的要简算.
×21×
(﹣)×12
×2+×2
16×25%+16×.
【解答】解:
(1)×21×
=15×
=
(2)(﹣)×12
=×12﹣×12
=9﹣4
=5
(3)×2+×2
=(+)×2
=1×2
=2
(4)16×25%+16×
=4+4
=8
23.直接写出得数.
××8=
100﹣99%=
÷=
×=
﹣×0=
3×÷3×=
+8=
÷=
【解答】解:
××8=15
100﹣99%=
÷=
×=
﹣×0=
3×÷3×=
+8=
÷=
24.直接写出得数.
+=
×+=
2×32=
×4%=
÷=
5﹣5×=
60%×=
×(﹣)=
【解答】解:
+=
×+=
2×32=18
×4%=
÷=5
5﹣5×=4
60%×=
×(﹣)=0
25.计算下面各题,能简算的要简算.
(15﹣14×)×
101×
×﹣÷.
【解答】解:
①
=
=;
②(15﹣14×)×
=(15﹣8)×
=
=;
③101×
=(100+1)×
=
=
=;
④×﹣÷
=
=()×
=2×
=.
26.计算,能简便的要简便计算
×+÷6
÷+÷
×+×
(+﹣)×24
÷5+5÷
56×.
【解答】解:
(1)×+÷6
=×+×
=(+)×
=1×
=;
(2)÷+÷
=+×4
=
=;
(3)×+×
=(+)×
=1×
=;
(4)(+﹣)×24
=×24+×24﹣×24
=16+4﹣3
=17;
(5)÷5+5÷
=×+5×
=+9
=9;
(6)56×
=(57﹣1)×
=57×﹣
=17﹣
=16.
27.直接写得数
×16=
12÷=
0×+=
×÷×=
+﹣+
28×(+)=
【解答】解:
×16=12
12÷=20
0×+=
×÷×=
+﹣+=
28×(+)=19
28.计算
(1+0÷)÷
+8+
×.
【解答】解:
(1)(1+0÷)÷
=(1+0)÷
=1÷
=;
(2)+8+
=++8
=1+8
=9;
(3)×=.
29.能简算的要简算.
+++
×
45×21﹣50×
+++
++﹣
﹣(﹣)
××80×
×+×.
【解答】解:
(1)+++
=(+)+(+)
=1+
=1;
(2)×
=(8+)×
=8×+×
=10+1
=11;
(3)45×21﹣50×
=45×21﹣5×21
=(45﹣5)×21
=40×21
=840;
(4)+++
=(+)+(+)
=1+1
=2;
(5)++﹣
=(+)+(﹣)
=1+
=1;
(6)﹣(﹣)
=﹣+
=+﹣
=1﹣
=;
(7)××80×
=(×80)×(×)
=100×1
=100;
(8)×+×
=×+×
=×(+)
=×10
=.
30.计算下面各题,能用简便算法的要用简便算法.
(1)×÷
(2)﹣÷×
(3)÷+×
(4)20÷〔(+)×〕
【解答】解:
(1)×÷
=÷
=;
(2)﹣÷×
=﹣2×
=﹣
=;
(3)÷+×
=×+×
=(+)×
=1×
=;
(4)20÷[(+)×]
=20÷[×]
=20÷
=80.
31.计算下面各题.
39××
﹣+
×+
1÷(÷)
(﹣)×24
÷[(﹣)÷].
【解答】解:
(1)39××
=39××
=6×
=;
(2)﹣+
=+
=;
(3)×+
=+
=;
(4)1÷(÷)
=1÷
=;
(5)(﹣)×24
=×24﹣×24
=10﹣4
=6;
(6)÷[(﹣)÷]
=÷[÷]
=÷
=.
32.
直接写出得数.
×0×6=
5﹣=
+×2=
×÷×=
9π=
6÷26=
50%﹣=
÷20%=
2+30%=
:
6=
【解答】解:
×0×6=0
5﹣=4
+×2=
×÷×=
9π=
6÷26=
50%﹣=
÷20%=4
2+30%=
:
6=
33.下面各题怎样简便就怎样算.
×99+
105×(+)
﹣﹣
+×﹣
+×+
×18﹣.
【解答】解:
(1)×99+
=×(99+1)
=×100
=370;
(2)105×(+)
=105×+105×
=35+21
=56;
(3)﹣﹣
=﹣(+)
=﹣4
=;
(4)+×﹣
=+﹣
=﹣
=;
(5)+×+
=++
=+(+)
=+1
=1;
(6)×18﹣
=×(18﹣1)
=×17
=15.
34.计算下面各题,能简算的要简算
﹣(+)
++
+﹣
﹣﹣
6﹣(﹣)
﹣++
﹣(﹣)