小数除法脱式运算+简算260道含答案Word格式.docx
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小数除法脱式运算+简算260道含答案Word格式.docx
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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×
23×
6.5+17×
6.5
36÷
(24.6﹣18.1)×
3.4
7.6×
9.9+7.6×
0.1
0.8×
12.5
23.9×
8.5﹣3.9×
(2.55+9.6÷
16)÷
0.42
9.2÷
0.25÷
4
8.脱式计算(能简算的要简算)
9.6+9.9×
99
15.58÷
8.2﹣0.72
4.536÷
0.8÷
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×
(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
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)
13.7×
32.7×
28+7.3×
28
15×
9.4﹣42
4.9+12.87﹣5.38
0.05×
20×
1.7.
15.计算下面各题,能简算的要简算.
5.04×
(15.4﹣7.8)×
3.5
3.2×
4.6+3.2×
5.4
17.4×
4
20﹣6.72﹣3.28
8.33+7.45+1.67+2.55
16.脱式计算.
0.2×
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×
0.8
39.8×
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
0.4
12.75÷
[14.6﹣(1.3+8.2)]
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)]÷
1÷
0.25+0.4×
0.6
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×
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)
1.25
4.87×
2.34+48.7×
0.266
0.49×
9.9
1.7
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×
102×
0.45
4.19×
99+4.19
21.36÷
0.8﹣12.9
3.2÷
0.26
27.计算(能简算的要简算).
6.33×
101﹣6.33
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÷
2.5
28.脱式计算(能简算的要简算)
1.37×
4.8×
25
0.89×
4.8+0.89×
5.2
101×
0.78×
20
8.8×
15
4.3×
29.计算下面各题,能简算的要简算.
44.28÷
0.9÷
4.1
0.39×
7.6+7.6×
9.07﹣22.78÷
99+4.8
10.1
30.下面各题,能简算的就要简算.
5.8+3.8×
1.7×
(4.65﹣3.87)
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
2.1﹣2.1
0.9×
100
2.8﹣2.8×
0.15
1.43+0.57
72×
0.81+10.3
10﹣6.06+8.5
1.8
7.06×
2.4﹣5.8
32.用简便方法计算.
9.87×
436.2×
1.8+13.8×
1.80.125×
2.3×
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
2.56.8×
9.97.2÷
[1.8×
(3.4﹣2.9)].
34.用你喜欢的方法计算.
9+3.46.4÷
0.8﹣1.5×
43.78÷
417÷
[(1.2+0.5)×
5].
35.用你喜欢的方法计算
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÷
419.7+(80.5÷
35×
37.计算,能简算的要简算.
2.25×
0.89.7×
99+9.74.8×
7.8+78×
0.523.65×
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×
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×
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÷
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
17.8×
0.24×
0.48×
9.9×
2.5
9.4×
5.8+10.6×
5.8
0.66×
0.25
2.33×
1.3×
2.5+0.7×
1.26×
0.6+1.26×
0.4
0.55
0.034×
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
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×
47.用自己喜欢的方法计算.
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
11×
39+61×
4.8
45.55﹣(6.82+15.55)
99+3.2
56+4.5×
56
(31.6﹣11.7)÷
3.6×
0.9+3.6×
49.计算下列各题.(能简算的要简算)
7.5﹣2.4÷
2.5
17+83×
399×
25÷
(2.5÷
0.4)
3.25×
67+5.75×
67+67
230÷
7.5
6.3+0.84+3.7+8.16
100﹣(2.72+10.8)÷
50.脱式计算
46.72+3.2÷
2.521.36÷
0.4﹣23.40.8×
4.5+1.2×
参考答案与试题解析
一.计算题(共50小题)1.【解答】解:
(1)32×
0.25=4×
0.25=(4×
0.25)×
12.5)=1×
100=100
(2)6.1×
6.1=6.1×
(4.2+5.8)=6.1×
10=61(3)1.7÷
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÷
0.3=0.6×
0.3=0.18答:
积是0.18. 3.【解答】解:
①4.8÷
0.5)=4.8÷
2.4=2②12.8﹣12.8÷
5=12.8﹣2.56=10.24③71.4÷
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÷
0.5=6.35÷
(0.2×
0.5)=6.35÷
0.1=63.5④5.7×
19=5.7÷
19×
1.2=0.3×
1.2=0.36⑤1.25×
0.8=(1.25×
0.8)×
3.63=1×
3.63=3.63 5.【解答】解:
①0.11×
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×
0.15=0.75÷
0.15×
18=5×
18=90④0.25×
8=0.25×
4.78=2×
4.78=9.56 6.【解答】解:
①17.3÷
8=17.3÷
(0.125×
8)=17.3÷
1=17.3②14.72×
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×
0.25=0.4×
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÷
23.3=0.7×
23.3=16.31;
(8)21.8÷
5=27.25﹣6=21.25;
(9)45÷
0.25)=45÷
21=
;
(10)16.5×
101﹣16.5=16.5×
(101﹣1)=16.5×
100=1650;
(11)0.96÷
14=3.2×
14=44.8;
(12)1.25×
8=(1.25×
8)×
(4×
2.5)=10×
10=100;
(13)36.45÷
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=(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×
0.4=0.25×
6.2=0.1×
6.2=0.62;
(21)23×
6.5=(23+17)×
6.5=40×
6.5=260;
(22)36÷
0.25=90×
0.25=22.5;
(23)(24.6﹣18.1)×
3.4=6.5×
3.4=22.1;
(24)7.6×
0.1=7.6×
(9.9+0.1)=7.6×
10=76;
(25)13.6×
12.5=13.6×
(0.8×
12.5)=13.6×
10=136;
(26)23.9×
8.5=(23.9﹣3.9)×
8.5=20×
8.5=170;
(27)(2.55+9.6÷
0.42=(2.55+0.6)÷
0.42=3.15÷
0.42=7.5;
(28)9.2÷
4=9.2÷
(0.25×
4)=9.2÷
1=9.2. 8.【解答】解:
(1)0.75×
4=(0.75×
4)×
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÷
14=5.67÷
14=0.405(5)2.8×
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×
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×
1.25=(8×
1.25)×
3.82=10×
3.82=38.2(4)0.125×
72=0.125×
9=1×
9=9(5)0.6×
0.8=2.34×
0.8=1.872(6)42×
6.1=42×
0.39+42×
0.61=42×
(0.39+0.61)=42×
1=42 10.【解答】解:
(1)0.25×
16=0.25×
(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×
0.2=8.37×
(1.2﹣0.2)=8.37×
1=8.37(4)43×
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×
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÷
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×
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=0.1×
13.7=1.37;
(3)32.7×
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×
1.7=0.05×
1.7=1×
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×
5.4=3.2×
(4.6+5.4)=3.2×
10=32;
(4)0.25×
4=0.25×
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×
4=(0.2×
0.5)×
(0.6×
4)=0.1×
2.4=0.24;
(2)(7.5﹣2.3×
0.01=(7.5﹣0.92)÷
0.01=6.58÷
0.01=658;
(3)1.2×
0.25=(1.2+2.8)×
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
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