小数除法脱式运算+简算260道含问题详解.docx
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小数除法脱式运算+简算260道含问题详解
小数除法脱式运算+简算260道
一.计算题(共50小题)
1.用你喜欢的方法计算.
32×12.5×0.256.1×4.2+5.8×6.11.7÷2.5÷0.416.1﹣4.2﹣5.8.
3.脱式计算
4.8÷(1.2÷0.5)12.8﹣12.8÷571.4÷(7×6)
4.用你喜欢的方法计算
0.65×101﹣0.6512.6﹣3.25+6.75
6.35÷0.2÷0.55.7×1.2÷191.25×3.63×0.8.
5.我能用喜欢的方法计算下面各题.
0.11×1.8+8.2×0.113.5﹣3.5×0.980.75×18÷0.150.25×4.78×8.
6.能简算的要简算.
17.3÷0.125÷814.72×0.7+5.28×0.7
3.5÷0.568.5×9.9+0.82.
7.递等式计算,有简便运算的用简便方法
38.75﹣(24.5+8.75)
0.4×2.32×0.25
0.75×101
4.2﹣3.2×0.9
7.56×99+7.56
70.3﹣17.48÷7.6
3.64÷5.2×23.3
21.8÷0.8﹣1.2×5
45÷(5.25÷0.25)
16.5×101﹣16.5
0.96÷0.3×14
1.25×4×2.5×8
36.45÷(0.82+3.4×0.2)
9.07﹣2.64÷0.4
1.5×101
12.6×7.5+8.3
13.6×0.85﹣3.6×0.85
104×8.5
86.4÷6.4﹣0.4
0.25×6.2×0.4
23×6.5+17×6.5
36÷0.4×0.25
(24.6﹣18.1)×3.4
7.6×9.9+7.6×0.1
13.6×0.8×12.5
23.9×8.5﹣3.9×8.5
(2.55+9.6÷16)÷0.42
9.2÷0.25÷4
8.脱式计算(能简算的要简算)
0.75×4×0.25×4
9.6+9.9×99
15.58÷8.2﹣0.72
4.536÷0.8÷14
2.8×3.6+1.4×2.8
6.3×10.1.
9.脱式计算(能简算的要用简算)
4.2×7.8+2.2×4.2
9.5×101
(8×3.82)×1.25
0.125×72
0.6×3.9×0.8
42×0.39+4.2×6.1
10.脱式计算,能简算的要简算
0.25×1.25×1618.9﹣18.9÷1.48.37×1.2﹣8.37×0.243×11.8+5.7×118.
11.用简便方法计算.
6.2+5.18+2.815.35﹣(5.35+7.2)
3.63﹣1.25+17.37﹣8.7551.72﹣8.66﹣1.34.
12.脱式计算,能简算的要简算.
0.7×101﹣0.70.125×4.95×812.9﹣1.68﹣2.32567÷20÷5.
13.用递等式计算,能简算的要简算.
20.16÷7.2+9.86.2×2.7+6.5×7.332.8+9.6+7.2.
14.脱式计算:
能简算的要简算
15.89﹣(5.89+6.98)
0.25×13.7×0.4
32.7×28+7.3×28
15×9.4﹣42
4.9+12.87﹣5.38
0.05×0.7×20×1.7.
15.计算下面各题,能简算的要简算.
5.04×28
(15.4﹣7.8)×3.5
3.2×4.6+3.2×5.4
0.25×17.4×4
20﹣6.72﹣3.28
8.33+7.45+1.67+2.55
16.脱式计算.
0.2×0.6×0.5×4(7.5﹣2.3×0.4)÷0.01
1.2×0.25+2.8×0.25178.8÷(26.4﹣5.6)
17.能简算的要简算
3.6﹣1.28+3.09
3.82+2.9+0.18+9.1
9.43﹣(6.28﹣1.57)
21.32﹣(6.32+8.3)
13.75﹣(3.75+6.48)
15﹣7.35﹣2.65
18.混合运算,能简便就简便
19.81﹣2.68﹣8.325.6+6.6﹣5.6+6.60.81×27+0.19×27101×0.19﹣0.19.
19.用简便方法计算
9.08﹣1.76﹣4.2418.38﹣(5.38+1.8)﹣8.2
17.45﹣(8.76﹣6.55)12.87+3.98﹣3.87.
20.脱式计算,能简便的用简便方法计算.
10.8÷(3.94+6.86)×0.8 0.65×201 12.5×3.9×0.8
39.8×0.25×437.6×8+37.6×2 0.78×99+0.78.
21.脱式计算:
21.8﹣7.22﹣2.78
9﹣0.24÷1.6×1.1
9.12+9.12×9﹣6.02
45.2×66.7+66.7×53.8+66.7
0.25×0.8×0.125×0.4
12.75÷[14.6﹣(1.3+8.2)]
0.125×36×(4÷0.5)÷36
[(6.1﹣4.6)×0.8﹣1]×0.36
15.6﹣(4.1+0.2+6.86÷0.7)
[5﹣(1﹣1.2×0.8)]÷4
1÷0.25+0.4×0.6
13.6×3﹣40.6÷2
25.8+10.5÷(5﹣3.5)
1.42﹣0.36÷6×0.6
49.5×0.2﹣2.07÷23
6.7+3.3÷4.4+5.6
22.计算下面各题(能简算的要简算)
50×(0.8+0.4)7.34×2.1+7.34×6.8+7.34×1.1
20.5÷1.25÷0.89.88×9+9.88.
23.计算下列各题(能用简便算法的要用简便算法).
12.6÷(1.02+3.18)5.7×6.9+4.3×6.9
(0.81+2.7)÷0.9[(8.4﹣7.9)÷0.25]×1.2.
25.能简算的用简便方法计算.(写出主要简便过程,无过程不得分)
1.6×3.9×1.25
4.87×2.34+48.7×0.266
0.49×9.9
0.05×0.7×20×1.7
2.5×3.2×12.5
3.95×7.6+3.95×3.4﹣3.95.
26.计算下面各题,能简算的要简算
7.8×6.9+2.2×6.9
2.36×2.5×4
102×0.45
4.19×99+4.19
21.36÷0.8﹣12.9
3.2÷0.8×0.26
27.计算(能简算的要简算).
6.33×101﹣6.33
1.6×55.4﹣55.4×0.6
17.68÷5.2+2.7×1.5
(1.1﹣0.78)×(2.7﹣1.95)
35.6﹣5×1.73
15÷0.2÷2.5
28.脱式计算(能简算的要简算)
2.5×1.37×0.4
4.8×0.25×25
0.89×4.8+0.89×5.2
101×0.78×20
8.8×1.25×15
4.3×0.8×5
29.计算下面各题,能简算的要简算.
44.28÷0.9÷4.1
0.25×0.39×4
7.6+7.6×99
9.07﹣22.78÷3.4
4.8×99+4.8
6.3×10.1
30.下面各题,能简算的就要简算.
5.8+3.8×0.25
1.7×(4.65﹣3.87)
1.25×4.3×0.8
4.5×102
0.54×101﹣0.54
3.4×2.5+6.6×2.5.
31.计算下列各题.
0.45×12×0.2
6.2×2.1﹣2.1
0.9×0.8×100
2.8﹣2.8×0.15
2.8×1.43+0.57
72×0.81+10.3
10﹣6.06+8.5
6×0.25×1.8
7.06×2.4﹣5.8
32.用简便方法计算.
0.25×9.87×436.2×1.8+13.8×1.80.125×2.3×8
0.73×102(6.8+2.6)×50.23×98.
33.能用简便方法的用简便方法计算
12.5×32×2.56.8×9.97.2÷[1.8×(3.4﹣2.9)].
34.用你喜欢的方法计算.
3.4×9+3.46.4÷0.8﹣1.5×43.78÷0.25÷417÷[(1.2+0.5)×5].
35.用你喜欢的方法计算
2.5×1.25×8×0.412.8×1.7+87.2×1.7100﹣4.35﹣5.65.
36.用递等式计算(能简算的要简算).
4+7.6×1526.08÷0.25÷419.7+(80.5÷35×0.2)
37.计算,能简算的要简算.
1.25×2.25×0.89.7×99+9.74.8×7.8+78×0.523.65×10.1.
38.计算下面各题.(能简算的用简便算法)
①12.36﹣6.49﹣3.51
②8.5×3.8+8.5×6.2
③17.3×0.25×8
④15.32﹣1.8×5﹣3.46
⑤199×2.6
⑥3.6÷[(1.3+0.6)×5]
39.计算
8.5+6.85﹣6.353.9+0.1﹣3.9+0.112.6﹣(3.75+5.08)
40.计算,能简算的要简算
6.09﹣9.13÷8.33.84×9.6+0.96×61.64.86×99
5.68×4+4.32÷0.256.4×4.5+3.6×4.5.
41.脱式计算.
10.5+61×18(3.14+12.6)÷84.5÷(15÷3)75+448÷4×19.
42.计算:
(18.5×3.8+3.8×2.5)÷0.19[32﹣(7.25+0.75×8)]÷50.
43.脱式计算,能简算的就简算:
25.32﹣(3.4﹣1.2)12﹣0.62﹣4.38.
44.用简便方法计算下面各题.
5.12+2.54+4.88
12.5×17.8×0.8
0.24×0.48×4
9.9×2.5
9.4×5.8+10.6×5.8
0.66×101
4.8×0.25
2.33×0.5×4
1.3×2.5+0.7×2.5
1.26×0.6+1.26×0.4
102×0.55
0.034×0.5×0.2
45.计算.(怎样简便就怎么计算)
13.38+0.98=7.02﹣2.986.57﹣(0.68﹣0.39+0.32)
13.8÷(1.38×0.2)30.7﹣0.12×2﹣0.767.8×1.01
18.4﹣6.5+1.6+3.57.8÷0.6+7.8÷0.412.13+7.5﹣1.13+2.85
0.125×8.89.4×3.2+6×0.329.6×3.6+7.2×0.2.
46.计算下面各题,能简算得要简算.
96÷(100×0.48)3.6÷(1.2+0.5)×6
(967﹣31)÷(17+48)72×10.1+27×10.1.
47.用自己喜欢的方法计算.
3.4×7.8÷3.954÷(6.86+3.94)
48.用简便方法计算
0.486+0.01+3.99
17.5×2.3﹣7.5×2.3
1.25×11×4×0.8
4.8×39+61×4.8
45.55﹣(6.82+15.55)
3.2×99+3.2
2.5×56+4.5×56
(31.6﹣11.7)÷2.5÷4
3.6×0.9+3.6×0.1
49.计算下列各题.(能简算的要简算)
7.5﹣2.4÷0.8×2.5
12.5×17+83×12.5
399×2.5
25÷(2.5÷0.4)
3.25×67+5.75×67+67
230÷2.5×7.5
6.3+0.84+3.7+8.16
100﹣(2.72+10.8)÷0.2
50.脱式计算
0.25×3.25×46.72+3.2÷2.521.36÷0.4﹣23.40.8×4.5+1.2×4.5.
小数除法脱式运算+简算260道
参考答案与试题解析
一.计算题(共50小题)1.【解答】解:
(1)32×12.5×0.25=4×8×12.5×0.25=(4×0.25)×(8×12.5)=1×100=100
(2)6.1×4.2+5.8×6.1=6.1×(4.2+5.8)=6.1×10=61(3)1.7÷2.5÷0.4=1.7÷(2.5×0.4)=1.7÷1=1.7(4)16.1﹣4.2﹣5.8=16.1﹣(4.2+5.8)=16.1﹣10=6.1 2.【解答】解:
(1)(0.6×0.8+0.12)÷1.2=0.6÷1.2=0.5答:
商是0.5.
(2)(14.81+5.19)×(14.81﹣5.19)=20×9.62=192.4答:
积是192.4.(3)[(2.7+4.5)÷12]×0.3=[7.2÷12]×0.3=0.6×0.3=0.18答:
积是0.18. 3.【解答】解:
①4.8÷(1.2÷0.5)=4.8÷2.4=2②12.8﹣12.8÷5=12.8﹣2.56=10.24③71.4÷(7×6)=71.4÷7÷6=10.2÷6=1.7 4.【解答】解:
①0.65×101﹣0.65=0.65×(101﹣1)=0.65×100=65②12.6﹣3.25+6.75=12.6+(6.75﹣3.25)=12.6+3.5=16.1③6.35÷0.2÷0.5=6.35÷(0.2×0.5)=6.35÷0.1=63.5④5.7×1.2÷19=5.7÷19×1.2=0.3×1.2=0.36⑤1.25×3.63×0.8=(1.25×0.8)×3.63=1×3.63=3.63 5.【解答】解:
①0.11×1.8+8.2×0.11=0.11×(1.8+8.2)=0.11×10=1.1②3.5﹣3.5×0.98=3.5×(1﹣0.98)=3.5×0.02=0.07③0.75×18÷0.15=0.75÷0.15×18=5×18=90④0.25×4.78×8=0.25×8×4.78=2×4.78=9.56 6.【解答】解:
①17.3÷0.125÷8=17.3÷(0.125×8)=17.3÷1=17.3②14.72×0.7+5.28×0.7=(14.72+5.28)×0.7=20×0.7=14③3.5÷0.56=(3.5÷0.7)÷(0.56÷0.7)=5÷8=0.625④8.5×9.9+0.82=8.5×(10﹣0.1)+0.82=8.5×10﹣8.5×0.1+0.82=85﹣0.85+0.82=85﹣(0.85﹣0.82)=85﹣0.03=84.97 7.【解答】解:
(1)38.75﹣(24.5+8.75)=38.75﹣24.5﹣8.75=38.75﹣8.75﹣24.5=30﹣24.5=5.5;
(2)0.4×2.32×0.25=0.4×0.25×2.32=0.1×2.32=0.232;(3)0.75×101=0.75×(100+1)=0.75×100+0.75×1=75+0.75=75.75;(4)4.2﹣3.2×0.9=4.2﹣2.88=1.32;(5)7.56×99+7.56=7.56×(99+1)=7.56×100=756;(6)70.3﹣17.48÷7.6=70.3﹣2.3=68;(7)3.64÷5.2×23.3=0.7×23.3=16.31;(8)21.8÷0.8﹣1.2×5=27.25﹣6=21.25;(9)45÷(5.25÷0.25)=45÷21=
;(10)16.5×101﹣16.5=16.5×(101﹣1)=16.5×100=1650;(11)0.96÷0.3×14=3.2×14=44.8;(12)1.25×4×2.5×8=(1.25×8)×(4×2.5)=10×10=100;(13)36.45÷(0.82+3.4×0.2)=36.45÷(0.82+0.68)=36.45÷1.5=24.3;(14)9.07﹣2.64÷0.4=9.07﹣6.6=2.47;(15)1.5×101=1.5×(100+1)=1.5×100+1.5×1=150+1.5=151.5;(16)12.6×7.5+8.3=94.5+8.3=102.8;(17)13.6×0.85﹣3.6×0.85=(13.6﹣3.6)×0.85=10×0.85=8.5;(18)104×8.5=(100+4)×8.5=100×8.5+4×8.5=850+34=884;(19)86.4÷6.4﹣0.4=13.5﹣0.4=13.1;(20)0.25×6.2×0.4=0.25×0.4×6.2=0.1×6.2=0.62;(21)23×6.5+17×6.5=(23+17)×6.5=40×6.5=260;(22)36÷0.4×0.25=90×0.25=22.5;(23)(24.6﹣18.1)×3.4=6.5×3.4=22.1;(24)7.6×9.9+7.6×0.1=7.6×(9.9+0.1)=7.6×10=76;(25)13.6×0.8×12.5=13.6×(0.8×12.5)=13.6×10=136;(26)23.9×8.5﹣3.9×8.5=(23.9﹣3.9)×8.5=20×8.5=170;(27)(2.55+9.6÷16)÷0.42=(2.55+0.6)÷0.42=3.15÷0.42=7.5;(28)9.2÷0.25÷4=9.2÷(0.25×4)=9.2÷1=9.2. 8.【解答】解:
(1)0.75×4×0.25×4=(0.75×4)×(0.25×4)=3×1=3
(2)9.6+9.9×99=9.6+9.9×(100﹣1)=9.6+9.9×100﹣9.9=9.6+990﹣9.9=989.7(3)15.58÷8.2﹣0.72=1.9﹣0.72=1.18(4)4.536÷0.8÷14=5.67÷14=0.405(5)2.8×3.6+1.4×2.8=2.8×(3.6+1.4)=2.8×5=14(6)6.3×10.1=6.3×(10+0.1)=6.3×10+6.3×0.1=63+0.63=63.63 9.【解答】解:
(1)4.2×7.8+2.2×4.2=4.2×(7.8+2.2)=4.2×10=42
(2)9.5×101=9.5×(100+1)=9.5×100+9.5=950+9.5=959.5(3)(8×3.82)×1.25=(8×1.25)×3.82=10×3.82=38.2(4)0.125×72=0.125×8×9=1×9=9(5)0.6×3.9×0.8=2.34×0.8=1.872(6)42×0.39+4.2×6.1=42×0.39+42×0.61=42×(0.39+0.61)=42×1=42 10.【解答】解:
(1)0.25×1.25×16=0.25×1.25×(2×8)=(0.25×2)×(1.25×8)=0.5×10=5
(2)18.9﹣18.9÷1.4=18.9﹣13.5=5.4(3)8.37×1.2﹣8.37×0.2=8.37×(1.2﹣0.2)=8.37×1=8.37(4)43×11.8+5.7×118=43×11.8+57×11.8=(43+57)×11.8=100×11.8=1180 11.【解答】解:
(1)6.2+5.18+2.8=6.2+2.8+5.18=9+5.18=14.18
(2)15.35﹣(5.35+7.2)=15.35﹣5.35﹣7.2=10﹣7.2=2.8(3)3.63﹣1.25+17.37﹣8.75=(3.63+17.37)﹣(1.25+8.75)=21﹣10=11(4)51.72﹣8.66﹣1.34=51.72﹣(8.66+1.34)=51.72﹣10=41.72 12.【解答】解:
(1)0.7×101﹣0.7=0.7×(101﹣1)=0.7×100=70
(2)0.125×4.7×8=0.125×8×4.7=1×4.7=4.7(3)12.9﹣1.68﹣2.32=12.9﹣(1.68+2.32)=12.9﹣4=8.9(4)567÷20÷5=567÷(20×5)=567÷100=5.67 13.【解答】解:
①20.16÷7.2+9.8=2.8+9.8=12.6;②6.2×2.7+6.5×7.3=16.74+47.45=64.19;③32.8+9.6+7.2=9.6+(32.8+7.2)=9.6+40=49.6. 14.【解答】解:
(1)15.89﹣(5.89+6.98)=15.89﹣5.89﹣6.98=10﹣6.98=3.02;
(2)0.25×13.7×0.4=0.25×0.4×13.7=0.1×13.7=1.37;(3)32.7×28+7.3×28=(32.7+7.3)×28=40×28=1120;(4)15×9.4﹣42=141﹣42=99;(5)4.9+12.87﹣5.38=17.77﹣5.38=12.39;(6)0.05×0.7×20×1.7=0.05×20×0.7×1.7=1×0.7×1.7=0.7×1.7=1.19. 15.【解答】解:
(1)5.04×28=(5+0.04)×28=5×28+0.04×28=140+1.12=141.12;
(2)(15.4﹣7.8)×3.5=7.6×3.5=26.6;(3)3.2×4.6+3.2×5.4=3.2×(4.6+5.4)=3.2×10=32;(4)0.25×17.4×4=0.25×4×17.4=1×17.4=17.4;(5)20﹣6.72﹣3.28=20﹣(6.72+3.28)=20﹣10=10;(6)8.33+7.45+1.67+2.55=8.33+1.67+7.45+2.55=(8.33+1.67)+(7.45+2.55)=10+10=20. 16.【解答】解:
(1)0.2×0.6×0.5×4=(0.2×0.5)×(0.6×4)=0.1×2.4=0.24;
(2)(7.5﹣2.3×0.4)÷0.01=(7.5﹣0.92)÷0.01=6.58÷0.01=658;(3)1.2×0.25+2.8×0.25=(1.2+2.8)×0.25=4×0.25=1;(4)178.8÷(26.4﹣5.6)=178.8÷20.8=
. 17.【解答】解:
(1)3.6﹣1.28+3.09=2.32+3.09=5.41
(2)3.82+2.9+0.18+9.1=(3.82+0.18)+(9.1+2.9)=4+12=16(3)9.43﹣(6.28﹣1.57)=9.43+1.57﹣6.28=11﹣6.28=4.72(4)21.32﹣(6.32+8.3)=21.32﹣6.32﹣8.3=15﹣8.3=6.7(5)13.75﹣(3.75+6.48)=13.75﹣3.75﹣6.48=10﹣6.48=3.52(6)15﹣7.35﹣2.65=15﹣(7.35+2.65)=15﹣10=5 18.【解答】解:
①19.81﹣2.68﹣8.32=19.81﹣(2.68+8.32)=19.81﹣11=8.81②5.6+6.6﹣5.6+6.6=(5.6﹣5.6)+(6.6+6.6)=0+13.2=13.2③0.81×