小数除法脱式运算+简算300道含答案.docx
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小数除法脱式运算+简算300道含答案.docx
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小数除法脱式运算+简算300道含答案
小数除法脱式运算+简算300道
一.计算题(共50小题)
1.用递等式进行计算,能简便的要简便简便计算.
7.29×4.6+46×1.271
(28.7﹣18.6÷3.1)×0.8
16﹣5.32﹣4.68
3.7×0.125+6.3÷8
40.8+14.7÷(14.6﹣12.5)
0.72+9.6÷3.2
2.用简便方法计算.
3.7×4.5﹣4.4×3.70.25×0.25×43.84﹣1.9+0.16﹣1.1
9﹣7÷2.5×0.45.5×[0.672÷(2+2.2)]
3.用递等式计算,能简算的要简算.
28.7÷7×4.59.6÷(15.4﹣12.2)4.6×1.2+2.8×4.693÷3.1÷0.3
4.计算下列各题(能用简便算法的要用简便算法).
(4.15+0.65)×0.99.06×14.7+5.3×9.06
(2.3+1.05÷2.1)×2.59.18÷[(5.9﹣2.3)×0.25].
5.选择合理的方法进行计算,并写出计算主要过程.
12.5×0.5×817.5÷(5.7﹣3.2)48.77﹣32.76÷8.4
10.25÷2.5÷0.418.1﹣2.8×4.63.01×101﹣30.1×0.1.
6.脱式计算,能简算的要简算.
4.8÷2.04÷2.41.1÷(22÷5)25÷40×0.4
72+0.9÷0.12517.37÷0.45﹣3.86÷0.19.07﹣22.78÷3.4+3.7.
7.用递等式计算,能简算的要简算.
10.01×101﹣10.010.11×1.8+8.2×0.11
26×20.2﹣8.4﹣1.812.05÷1.25÷0.8.
8.递等式计算(能简算的要简算)
6.5×994.65﹣2.55﹣1.452.2×0.25+2.8×0.250.25×6.82×4.
9.计算下面各题,能简算的要简算.
102×4.58×(20﹣1.25)8.3+8.3×99(1.25+12.5+125)×8.
10.计算(能简算要简算)
2.64+8.67+7.36+11.332.74×9.5+0.5×2.7(2400﹣480×2.5)÷1.6
16.8×10.11.25×886.87×[40÷(3.49﹣3.09)].
11.脱式计算(能简简的要简算)
2.8+0.2﹣2.8+0.237÷12.5÷0.81.25×(10+0.8)
10.8﹣3.8×0.4÷0.760.36÷[(6.1﹣4.6)×0.8].
12.计算下面各题,能简算的要简算.
4.05÷0.9+5.53.67×10.1﹣3.67×0.1
99×0.73+0.733.3+6.7×3.5.
13.怎样简便怎样算
3.7÷2.5÷0.4 0.25×1.25×32 9.83×1.5+0.617×15.
14.计算下面各题.(能简算的要简算)
12.13+7.5﹣12.137.69﹣(3.7+2.69)7.8×1.01
9.4×3.2+6×0.3212.5×3.213.8÷(1.38×2)
15.下面各题,怎样简便就怎样算
432.5÷25÷0.41.25×3.2×2.50.81×99+0.81
5.9×10.1100﹣52.8﹣47.2(4﹣0.4)×0.25.
16.计算下面各题,能简算的要简算.
0.75×18÷0.159.3÷0.125÷81.78×99+1.78
4.7×4.28+5.3×4.282.3×10.221.36÷0.2﹣25.9.
17.怎样简便就怎样计算
28.4×99+28.4
3.6×201
0.94×2.5﹣0.45
4×0.8×12.5×2.5
17.5÷0.25×17+13
15.58÷8.2﹣0.72.
18.计算,能简算的要简算.
1.25×2.5×0.8×43=10÷0.2÷2.5=8.4÷0.21÷0.5=
64×4.5+3.6×45=1.25×3.2×0.8=14.5×102=
19.脱式计算,能简算的要简算.
0.34×1018.8×1.252.94×6.3+3.7×2.94
21.9﹣9.28﹣10.722.7+(11.2﹣2.7)×0.41.5×[0.02÷(2.1﹣2.09)].
20.计算下面各题.(能简算的要简算)
10.7﹣22.78÷3.45.5×17.3+6.7×5.53.76÷0.4÷2.50.25×12.5×3.2.
21.递等式计算,能简便计算的要简便计算.
4.6×253.75÷12.5÷0.82.5+7.5÷4
(3.2﹣1.4)÷0.18﹣1.87.9×7.1+2.9×7.9(30.2﹣4.6×5)÷0.12.
22.下面各题,怎样简便就怎样计算.
0.75×0.5×0.85.6×15.7+9.3×5.650.4×1.9﹣1.8.
23.计算下面各题,注意运用简便方法.
2.4﹣0.2÷5×600.25×6.8×40
5.52﹣0.55﹣0.450.49×7.2﹣7.2×0.39.
24.计算,能简算的要写出简算过程.
4×0.8×2.5×12.52.25×4.8+77.5×0.48.
25.计算下面各题,能简算的要简算.
13.73+6.27÷0.318÷0.4÷2.50.75×99+0.75
2.85×5.35+2.85×4.651.5×0.4÷1.5×0.4.
26.怎样简便就怎样计算
28.4×99+28.43.6×2010.94×2.5﹣0.45
4×0.8×12.5×2.517.5÷0.25×17+131.25×8.08.
27.下面各题,怎样算简便就怎样算.
2.45﹣(1.45+0.89)1.25×1.7×0.85.3×0.82﹣0.82×0.3
3.6÷[12×(0.53﹣0.45)].
28.计算下面各题,能简算的要简算.
125×32×2.5
2.6×(3.4+1.6)
6.7×5.5+5.5×3.3.
36×99
9.07﹣2.2﹣7.8
17.6÷4÷2.5
29.计算下面各题,能简算的要简算.
2.5×0.27×40.63×1010.78+0.22÷5
3.7×12.5+4.3×12.5(0.36+5.4)÷0.64.5÷0.25÷1.6.
30.脱式计算(能简便的用简便计算).
1.6×(2.25+10.5÷1.5)
74×57+43×74
0.6÷[(6.1﹣4.6)×0.8]
101×92﹣92
125×64
46.2×0.56+5.37×5.6+1×0.056
31.脱式计算(能简算的就简算)
1.5×1021.25×213×0.872×0.81﹢10.4
1.25×5.66.05÷0.5+10.7529.6÷0.8﹣1.2×5.
32.脱式计算下列各题,能简算的要简算.
2.69×99+2.69
1.25×2.3×0.8
3.17×5.6+4.4×3.17
38÷0.25÷0.4
6.5÷0.125
0.225÷0.25×4
33.脱式计算(能简算的要简算).
17.54+28.35+3.46+1.5532.36﹣13.43﹣(7.57+1.36)7.2×2.745÷0.36
3.85×5.6+5.4×3.85﹣3.85(3.2+0.128)÷0.8(13.3﹣8.8)×3.2÷0.36.
34.脱式计算(能简算的要简算)
0.75×4×0.25×46.3×10.115.58÷8.2﹣0.724.536÷0.8÷14.
35.脱式计算,能简算的要简算.
7.5×2+1.25÷0.5
98×7.5
80÷0.25+0.75
19×3.8+3.8
1.25×3.4×0.8
5.12÷0.4÷2.5
36.计算,能简算的要简算
55.04+12.8﹣3.30.25×32×0.1257.8×75+75×0.2.
37.用你喜欢的方法计算.
0.21×14÷0.50.25×13×41.25×9.7﹣1.25×1.7
16.5÷[(5.2+4.8)×1.5](8.92﹣0.45)÷(2.5+4.5)
38.下面各题怎样算简便就怎样算.
6.8×0.46+0.545.4×2.3+5.4×7.7
0.25×32×12.575÷1.25÷8.
39.用递等式计算,(有★用简算)
7.8﹣7.2+0.9
0.38+0.26+3.4
(125﹣45)×3
13+[(41+22)÷9]
★6.7+2.5+3.3
★13×25×4.
40.脱式计算,能简算的要简算
12.8+2.04×9.50.15×1999+0.150.76×6.5﹣0.76×5.578÷0.25÷0.4.
41.计算下面各题,怎样简便就怎样计算.
4.05÷0.5+10.756.8×2.7+2.7×3.26.8×0.75÷0.5
70.3﹣17.48÷7.68.5×1.2÷3.413.75÷0.125﹣2.7.
42.计算下面各题,能用简便方法计算的要用简便方法.
0.75×18÷0.15
6.15÷0.125÷0.8
4.55÷0.28﹣0.47
1.7×2.5×0.08
1.89×11﹣1.89
3.6×0.35+6.4×0.35
43.计算下面各题,能简算的要简算.
3.4+6.6÷0.325×1.25×0.04×0.8
99×0.73+7.3×0.196.5÷1.25÷0.8.
44.脱式计算(能简算的用简算方法)
82.4﹣12.4×5
18.5﹣3.21﹣4.79
8.4+3.8+1.6+6.2
0.25×17.3×0.4
7.2×(10+0.1)
3.54×0.29﹣0.29×2.54
45.计算下列各题,怎么简便就怎么算.
0.125×32
8.8÷0.25÷4
56.5×99+56.5
0.78×101
9.9﹣2.07÷2.3
12.75÷[14.6﹣(1.3+8.2)].
46.计算,能简算的要简算.
60.8﹣36÷3.6
12.5×7.2×0.8
99×78.5+78.5
24.6﹣8.9﹣1.1
0.9+9.9+99.9+999.9
695÷25÷4.
47.脱式计算(能简算的要简算)
5.8+6.3÷9×0.5
1.25×0.8÷1.25×0.8
1.92÷0.12﹣2.7
2.65×1.7+1.35×1.7﹣1.7
138÷0.25÷4
1.25×2.5×3.2
48.你能想出简便方法来计算下面各题吗?
25×5+74×5+5
6.74+12.62+24.38+3.26
87﹣2.123﹣0.877
30.65﹣(7.65+5.4)
(40+8)×125
32×38+32×62.
49.脱式计算.(能简算的要简算)
65×102
8.23﹣(2.67+3.23)
32×16+14×32
8.46+7.26+1.51+2.84
27×[(263+37)÷50]
125×32×25.
50.递等式计算(能简算的要简算)
5.6×0.250.32×0.25×12.56.4÷(0.3×2+0.2)
201×6.5﹣6.5102×4.52.2×0.25+2.8×0.25.
小数除法脱式运算+简算300道
参考答案与试题解析
一.计算题(共50小题)1.【解答】解:
①7.29×4.6+46×1.271=7.29×4.6+4.6×12.71=(7.29+12.71)×4.6=20×4.6=92;②(28.7﹣18.6÷3.1)×0.8=(28.7﹣6)×0.8=22.7×0.8=18.16;③16﹣5.32﹣4.68=16﹣(5.32+4.68)=16﹣10=6;④3.7×0.125+6.3÷8=3.7×
+6.3×
=(3.7+6.3)×
=10×
=
;⑤40.8+14.7÷(14.6﹣12.5)=40.8+14.7÷2.1=40.8+7=47.8;⑥0.72+9.6÷3.2=0.72+3=3.72. 2.【解答】解:
(1)3.7×4.5﹣4.4×3.7=3.7×(4.5﹣4.4)=3.7×0.1=0.37;
(2)0.25×0.25×4=0.25×(0.25×4)=0.25×1=0.25;(3)3.84﹣1.9+0.16﹣1.1=(3.84+0.16)﹣(1.9+1.1)=4﹣3=1;(4)9﹣7÷2.5×0.4=9﹣2.8×0.4=9﹣1.12=7.88;(5)5.5×[0.672÷(2+2.2)]=5.5×[0.672÷4.2]=5.5×0.16=0.88. 3.【解答】解:
(1)28.7÷7×4.5=4.1×4.5=18.45
(2)9.6÷(15.4﹣12.2)=9.6÷3.2=3(3)4.6×1.2+2.8×4.6=4.6×(1.2+2.8)=4.6×4=18.4(4)93÷3.1÷0.3=30÷0.3=100 4.【解答】解:
(1)(4.15+0.65)×0.9=4.8×0.9=4.32;
(2)9.06×14.7+5.3×9.06=9.06×(14.7+5.3)=9.06×20=181.2;(3)(2.3+1.05÷2.1)×2.5=(2.3+0.5)×2.5=2.8×2.5=7;(4)9.18÷[(5.9﹣2.3)×0.25]=9.18÷[3.6×0.25]=9.18÷0.9=10.2. 5.【解答】解:
(1)12.5×0.5×8=12.5×8×0.5=100×0.5=50;
(2)17.5÷(5.7﹣3.2)=17.5÷2.5=7;(3)48.77﹣32.76÷8.4=48.77﹣3.9=44.87;(4)10.25÷2.5÷0.4=10.25÷(2.5×0.4)=10.25÷1=10.25;(5)18.1﹣2.8×4.6=18.1﹣12.88=5.22;(6)3.01×101﹣30.1×0.1=3.01×(101﹣1)=30.1×100=30100. 6.【解答】解:
(1)4.8÷2.04÷2.4=4.8÷2.4÷2.04=2÷2.04=
(2)1.1÷(22÷5)=1.1÷22×5=0.05×5=0.25(3)25÷40×0.4=25×0.4÷40=10÷40=0.25(4)72+0.9÷0.125=72+7.2=79.2(5)17.37÷0.45﹣3.86÷0.1=38.6﹣38.6=0(6)9.07﹣22.78÷3.4+3.7=9.07﹣6.7+3.7=2.37+3.7=6.07 7.【解答】解:
(1)10.01×101﹣10.01=10.01×(101﹣1)=10.01×100=1001
(2)0.11×1.8+8.2×0.11=0.11×(1.8+8.2)=0.11×10=1.1(3)26×20.2﹣8.4﹣1.8=525.2﹣(8.4+1.8)=525.2﹣10.2=515(4)12.05÷1.25÷0.8=12.05÷(1.25×0.8)=12.05÷1=12.05 8.【解答】解:
①6.5×99=6.5×(100﹣1)=6.5×100﹣6.5=650﹣6.5=643.5②4.65﹣2.55﹣1.45=4.65﹣(2.55+1.45)=4.65﹣4=0.65③2.2×0.25+2.8×0.25=(2.2+2.8)×0.25=5×0.25=1.25④0.25×6.82×4=(0.25×4)×6.82=1×6.82=6.82 9.【解答】解:
①102×4.5=(100+2)×4.5=100×4.5+2×4.5=450+9=459②8×(20﹣1.25)=8×20﹣8×1.25=160﹣10=150③8.3+8.3×99=8.3×(1+99)=8.3×100=830④(1.25+12.5+125)×8=1.25×8+12.5×8+125×8=10+100+1000=110+1000=1110 10.【解答】解:
①2.64+8.67+7.36+11.33=(2.64+7.36)+(8.67+11.33)=10+20=30②2.74×9.5+0.5×2.7=26.03+1.35=27.38③(2400﹣480×2.5)÷1.6=(2400﹣1200)÷1.6=1200÷1.6=750④16.8×10.1=16.8×(10+0.1)=16.8×10+16.8×0.1=168+1.68=169.68⑤1.25×88=1.25×(80+8)=1.25×80+1.25×8=100+10=110⑥6.87×[40÷(3.49﹣3.09)]=6.87×[40÷0.4]=6.87×100=687 11.【解答】解:
(1)2.8+0.2﹣2.8+0.2=(2.8﹣2.8)+(0.2+0.2)=0+0.4=0.4
(2)37÷12.5÷0.8=37÷(12.5×0.8)=37÷10=3.7(3)1.25×(10+0.8)=1.25×10+1.25×0.8=12.5+1=13.5(4)10.8﹣3.8×0.4÷0.76=10.8﹣1.52÷0.76=10.8﹣2=8.8(5)0.36÷[(6.1﹣4.6)×0.8]=0.36÷[1.5×0.8]=0.36÷1.2=0.3 12.【解答】解:
(1)4.05÷0.9+5.5=4.5+5.5=10
(2)3.67×10.1﹣3.67×0.1=3.67×(10.1﹣0.1)=3.67×10=36.7(3)99×0.73+0.73=(99+1)×0.73=100×0.73=73(4)3.3+6.7×3.5=3.3+23.45=26.75 13.【解答】解:
①3.7÷2.5÷0.4=3.7÷(2.5×0.4)=3.7÷1=3.7 ②0.25×1.25×32=0.25×1.25×(4×8)=(0.25×4)×(1.25×8)=1×10=10 ③9.83×1.5+0.617×15=9.83×1.5+6.17×1.5=1.5×(9.83+6.17)=1.5×16=24 14.【解答】解:
①12.13+7.5﹣12.13=12.13﹣12.13+7.5=0+7.5=7.5②7.69﹣(3.7+2.69)=7.69﹣3.7﹣2.69=7.69﹣2.69﹣3.7=5﹣3.7=1.3③7.8×1.01=7.8×(1+0.01)=7.8×1+7.8×0.01=7.8+0.078=7.878④9.4×3.2+6×0.32=9.4×3.2+0.6×3.2=3.2×(9.4+0.6)=3.2×10=32⑤12.5×3.2=12.5×(8×0.4)=12.5×8×0.4=100×0.4=40⑥13.8÷(1.38×2)=13.8÷1.38÷2=10÷2=5 15.【解答】解:
①432.5÷25÷0.4=432.5÷(25×0.4)=432.5÷10=43.25②1.25×3.2×2.5=1.25×(8×0.4)×2.5=(1.25×8)×(0.4×2.5)=10×1=10③0.81×99+0.81=0.81×(99+1)=0.81×100=81④5.9×10.1=5.9×(10+0.1)=5.9×10+5.9×0.1=59+0.59=59.59⑤100﹣52.8﹣47.2=100﹣(52.8+47.2)=100﹣100=0⑥(4﹣0.4)×0.25=4×0.25﹣0.4×0.25=1﹣0.1=0.9 16.【解答】解:
(1)0.75×18÷0.15=0.75÷0.15×18=5×18=90;
(2)9.3÷0.125÷8=9.3÷(0.125×8)=9.3÷1=9.3;(3)1.78×99+1.78=1.78×(99+1)=1.78×100=178;(4)4.7×4.28+5.3×4.28=(4.7+5.3)×4.28=10×4.28=42.8;(5)2.3×10.2=2.3×(10+0.2)=2.3×10+2.3×0.2=23+0.46=23.46;(6)21.36÷0.2﹣25.9=106.8﹣25.9=80.9. 17.【解答】解:
(1)28.4×99+28.4=28.4×(99+1)=28.4×100=2840
(2)3.6×201=3.6×(200+1)=3.6×200+3.6×1=720+3.6=723.6(3)0.94×2.5﹣0.45=2.35﹣0.45=1.9(4)4×0.8×12.5×2.5=(4×2.5)×(0.8×12.5)=10×10=100(5)17.5÷0.25×17+13=70×17+13=1190+13=1203(6)15.58÷8.2﹣0.72=1.9﹣0.72=1.18 18.【解答】解:
(1)1.25×2.5×0.8×43=1.25×0.8×2.5×43=1×2.5×43=107.5;
(2)10÷0.2÷2.5=10÷(0.2×2.5)=10÷0.5=20;(3)8.4÷0.21÷0.5=40÷0.5=80;(4)64×4.5+3.6×45=64×4.5+36×4.5=(64+36)×4.5=100×4.5=450;(5)1.25×3.2×0.8=1.25×0.8×3.2=1×3.2=3.2;(6)14.5×102=14.5×(100+2)=14.5×100+14.5×2=1450+29=1479. 19.【解答】解:
(1)0.34×101=0.34×(100+1)=0.34×100+0.34×1=34+0.34=34.34;
(2)8.8×1.25=(1.1×8)×1.25=1.1×(8×1.25)=1.1×10=11;(3)2.94×6.3+3.7×2.94=2.94×(6.3+3.7)=2.94×10=29.4;(4)21.9﹣9.28﹣10.72=21.9﹣(9.28+10.72)=21.9﹣20=1.9;(5)2.7+(11.2﹣2.7)×0.4=2.7+8.5×0.4=2.7+3.4=6.1;(6)1.5×[0.02÷(2.1﹣2.09)]=1.5×[0.02÷0.01]=1.5×2=3. 20.【解答】解:
①10.7﹣22.78÷3.4=10.7﹣6.7=4②5.5×17.3+6.7×5.5=5.5×(17.3+6.7)=5.5×24=132③3.76÷0.4÷2.5=3.76÷(0.4×2.5)=3.76÷1=3.76④0.25×12.5×3.2=0.25×12.5×(4×0.8)=(0.25×4)×(12.5×0.8)=1×10=10 21.【解答】解:
(1)4.6×25=(4+0.6)×25=4×25+0.6×25=100+15=115;
(2)3.75÷12.5÷0.8=3.75÷(12.5÷0.8)=3.75÷10=0.375;(3)2.5+7.5÷4=2.5+1.875=4.375;(4)(3.2﹣1.4)÷0.18﹣1.
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