小数除法计算300道脱式运算+简算含答案docx.docx
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小数除法计算300道脱式运算+简算含答案docx.docx
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小数除法计算300道脱式运算+简算含答案docx
小数除法脱式运算+简算300道
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.
7.29X4.6+46X1.271
(28.7・18.6一3.1)X0.8
16-5.32-4.68
3.7X0.125+6.3—8
40.8+14.74-(14.6-12.5)
0.72+9.6一3.2
2.用简便方法计算.
3.7X4.5-4.4X3.7
0.25X0.25X43.84-1.9+0.16
-1.1
9-7宁2.5X0.4
5.5X[0.672^(2+2.2)]
3.用递等式计算,能简算的要简算.
934-3.14-0.3
28.7—7X4.59.6十(15.4-12.2)4.6X1.2+2.8X4.6
4•计算下列各题(能用简便算法的要用简便算法).
(2.3+1.05^2.1)X2.5
9.18^[(5.9-23)X0.25].
5.选择合理的方法进行计算,并写出计算主要过程.
12.5X0.5X817.5十(5.7-3.2)48.77-32.76^8.4
10.25^2.5^0.418.1-2.8X4.6
3.01X101-30.1X0.1.
6.脱式计算,能简算的要简算.
4.8^2.04^2.41.1^(22F5)
25一40X0.4
72+0.9^0.125
17374-0.45-3.864-0.1
9.07-22.784-3.4+3.7.
7.用递等式计算,
能简算的要简算・
10.01X101-10.01
0.11X1.8+8.2X0.11
&递等式计算(能简算的要简算)
6.5X994.65-2.55-1.452.2X0.25+2.8X0.250.25X6.82X4.
9.计算下面各题,能简算的要简算.
102X4.58X(20-1.25)8.3+8.3X99(1.25+12.5+125)X8.
10.计算(能简算要简算)
2.64+8.67+7.36+11.332.74X9.5+0.5X2.7(2400-480X2.5)4-1.6
16.8X10.11.25X886.87X[404-(3.49-3.09)]•
□・脱式计算(能简简的要简算)
2.8+0.2-2.8+0.237^12.54-0.81.25X(10+0.8)
12•计算下而各题,能简算的要简算.
15.下面各题,怎样简便就怎样算
16•计算下面各题,能简算的要简算.
17.怎样简便就怎样计算
18•计算,能简算的要简算.
19•脱式计算,能简算的要简算.
5.5X17.3+6.7X5.53.76^0.4^2.50.25X12.5X3.2.
21・递等式计算,能简便计算的要简便计算.
4.6X253.75^12.5^0.82.5+7.5V4
(3.2-1.4)^0.18-1.87.9X7.1+2.9X7.9(30.2-4.6X5)^0.12.
22.下面各题,怎样简便就怎样计算.
0.75X0.5X0.85.6X15.7+9.3X5.650.4X1.9-1•&
23•计算下面各题,注意运用简便方法.
24•计算,能简算的要写出简算过程.
27・下面各题,怎样算简便就怎样算.
2.45-(1.45+0.89)1.25X1.7X0.85.3X0.82-0.82X0.3
3.6^[12X(0.53-0.45)]•
36X99
9.07-2.2-7.8
17.6F4—2.5
29•计算下面各题,
2.5X0.27X4
能简算的要简算.
0.63X101
0.78+0.22^5
30・脱式计算(能简便的用简便计算).
1.6X(2.25+10.5^1.5)74X57+43X740.6—[(6.1-4.6)X0.8]
31.脱式计算(能简算的就简算)
32.脱式计算下列各题,能简算的要简算.
33•脱式计算(能简算的要简算).
3.85X5.6+5.4X3.85-3.85(3.2+0.128)一0.8(13.3-8.8)X3.2—0.36.
34.脱式计算(能简算的要简算)
0.75X4X0.25X46.3X10.115.584-8.2-0.724.536一0.8一14.
35.脱式计算,能简算的要简算.
38・下面各题怎样算简便就怎样算.
6.8X0.46+0.545.4X23+5.4X7.7
6.9
39.用递等式计算,(有★用简算)
40.脱式计算,能简算的要简算
44.脱式计算(能简算的用简算方法)
82.4-12.4X518.5-3.21-4.798.4+3.8+1.6+6.2
0.25X17.3X0.47.2X(10+0.1)3.54X0.29-0.29X2.54
45•计算下列各题,怎么简便就怎么算.
0.125X32
8.8^0.254-4
56.5X99+56.5
0.78X101
9.9-2.07一2.3
12.75一[14.6-(1.3+8.2)].
46.
计算,能简算的要简算.
47.脱式计算(能简算的要简算)
48.
你能想出简便方法来计算下面各题吗?
49.
小数除法脱式运算+简算300道
参考答案与试题解析
—.计算题(共50小题)1.【解答】解:
①7.29X4.6+46X1.271=7.29
X4.6+4.6X12.71=(7.29+12.71)X4.6=20X4.6=92;®(28.7-18.6H-3.1)X0.8=(28.7-6)X0.8=22.7X0.8=18.16;@16-5.32-4.68=16-(5.32+4.68)=16・10=6;©3.7X0.125+6.3一8=3.7X1+6.3X丄二(3.7+6.3)X丄=10X丄=§;
88884
⑤40.8+14.74-(14.6-12.5)=40.8+14.74-2.1=40.8+7=47.8;⑥0.72+9.64-3.2=0.72+3=3.72・2.【解答】解:
(1)3.7X4.5-4.4X3.7二3.7X(4.5-4.4)
=3.7X0.1=0.37;
(2)0.25X0.25X4=0.25X(0.25X4)=0.25X1=0.25;(3)3.84-1.9+0.16-1.1=(3.84+0.16)-(1.9+1.1)=4-3=1;(4)9-74-2.5X0.4=9-2.8X0.4=9-1.12=7.88;(5)5.5X[0.6724-(2+2.2)]=5.5X[0.6724-4.2]=5.5X0.16=0.88.3・【解答】解:
(1)28.74-7X4.5=4.1X4.5=18.45
(2)9.6—(15.4
-12.2)=9.64-3.2=3(3)4.6X1.2+2.8X4.6=4.6X(1.2+2.8)=4.6X4=18.4(4)
934-3.14-03=304-0.3=1004.【解答】解:
(1)(4.15+0.65)X0.9=4.8X0.9=4.32;
(2)9.06X14.7+5.3X9.06=9.06X(14.7+5.3)=9.06X20=181.2;(3)(2.3+1.054-2.1)X2.5二(2.3+0.5)X2.5=2.8X2.5=7;(4)9.184-[(5.9-2.3)X0.25]=9.184-[3.6X0.25]=9.184-0.9=10.2.5.【解答】解:
(1)12.5X0.5X8=12.5X8X0.5=100X0.5=50;
(2)17.54-(5.7-3.2)=17.54-2.5=7;(3)48.77-32.76一8.4=48.77
-3.9=44.87;(4)10.25子2.5十0.4=10.25十(2.5X0.4)=10.254-1=10.25;(5)18.1-2.8X4.6=18.1-12.88=5.22;(6)3.01X101-30.1X0.1=3.01X(101-1)=30.1X100=30100.6.【解答】解:
(1)4.8三2.04=2.4二4・8一2.4F2.04二2宁
2.04二空
(2)1.14-(22=5)=1.14-22X5=0.05X5=0.25(3)25宁40X0.4二25X51
0.4^40=104-40=0.25(4)72+0.9—0.125二72+7.2二79.2(5)17.37H-0.45-3.864-
0.1=38.6-38.6=0(6)9.07-22.784-3.4+3.7=9.07-6.7+3.7=2.37+3.7=6.077.【解
答】解:
(1)10.01X101・10.01=10・01X(101=10.01X100=1001.
(2)0.11
X1.8+8.2X0.11=0.11X(1.8+8.2)=0.11X10=1.1(3)26X20.2-8.4・1.8二525.2-(8.4+1.8)=525.2-10.2=515(4)12.05—1.25—0.8二12.05宁(1.25X0.8)=12.054-1=12.058・【解答】解:
①6.5X99二6.5X(100-1)=6.5X100-6.5=650-
6.5=643.5②4.65-2.55-1.45=4.65-(2.55+1.45)=4.65-4=0.65@2.2X0.25+2.8X0.25=C2.2+2.8)X0.25=5X0.25=1.25④0.25X6.82X4二(0.25X4)X6.82=1X6.82=6.829•【解答】解:
①102X4.5=(100+2)X4.5=100X4.5+2X4.5=450+9=459
28X(20-1.25)=8X20-8X1.25=160-10=150③8.3+8.3X99二8.3X(1+99)
=8.3X100=830④(1.25+12.5+125)X8=1.25X8+12.5X8+125X8=10+100+1000=110+1000=111010.【解答】解:
①2.64+8.67+7.36+11.33=
(2.64+7.36)+(&67+11.33)=10+20=30
(2)2.74X9.5+0.5X2.7=26.03+1.35=27.38
3(2400・480X2.5)一1.6二(2400-1200)1.6=12001.6=750④16.8X10.1二16.8
X(10+0.1)=16.8X10+16.8X0.1=168+1.68=169.68⑤1.25X88二1.25X(80+8)=1.25X80+1.25X8=100+10=110(6)6.87X[40-r(3.49-3.09)]二6.87X[404-0.4]二6.87X100=68711•【解答】解:
(D2.8+0.2-2.8+0.2二(2.8-2.8)+(0.2+0.2)二0+0.4二0.4
(2)37^12.54-0.8=374-(12.5X0.8)=37^-10=3.7(3)1.25X(10+0.8)=1.25X10+1.25X0.8=12.5+1=13.5(4)10.8-3.8X0.4一0.76=10.8-1.52一0.76=10.8-2=8.8(5)0.364-[(6.1-4.6)X0.8]=0.36^[1.5X0.8]=0.364-1.2=0.312.【解答】解:
(1)4.054-0.9+5.5=4.5+5.5=10
(2)3.67X10.1-3.67X0.1=3.67X(10.1-0.1)=3.67X10=36.7(3)99X0.73+0.73=(99+1)X0.73=100X0.73=73
(4)33+6.7X3.5=3.3+23.45=26.7513.【解答】解:
@3.74-2.54-0.4=3.74-(2.5X0.4)二3.7*1二3.7②0.25X1.25X32=0.25X1.25X(4X8)=(0.25
X4)X(1.25X8)=1X10=10③9.83X1.5+0.617X15=9.83X1.5+6.17
X1.5=1.5X(9.83+6.17)=1.5X16=2414•【解答】解:
①12.13+7.5-12.13=12.13-12.13+7.5=0+7.5=7.5
(2)7.69-(3.7+2.69)=7.69-3.7-2.69=7.69-2.69
・3.7=5-3.7=13(3)7.8X1.01=7.8X(1+0.01)=7.8X1+7.8X0.01=7.8+0.078=7.878④9.4X3.2+6X0.32=9.4X3.2+0.6X3.2=3.2X(9.4+0.6)=3.2X10=32⑤
12.5X3.2=12.5X(8X0.4)=12.5X8X0.4=100X0.4=40@13.84-(1.38
X2)=13.84-1.38^2=104-2=515.【解答】解:
①432.5^254-0.4=432.54-(25
X0.4)=432.54-10=43.25②1.25X3.2X2.5J.25X(8X0.4)X2.5=(1.25X8)X(0.4X2.5)=10X1=10③0.81X99+0.81二0.81X(99+1)=0.81X100=81④5.9X10.1=5.9X(10+0.1)=5.9X10+5.9X0.1=59+0.59=59.59⑤100-52.8-
47.2=100-(52.8+47.2)=100-100=0@(4-0.4)X0.25=4X0.25-0.4X0.25=1-0.1=0.916.【解答】解:
(1)0.75X18三0.15=0.75H-0.15X18=5X18=90;
(2)9.34-0.1254-8二9.3一(0.125X8)=9.34-1=9.3;(3)1.78X99+1.78=1.78
X(99+1)=1.78X100=17&(4)4.7X4.28+5.3X4.28=(4.7+53)X4.28=10
X4.28=42.8;(5)2.3X10.2=2.3X(10+0.2)=2.3X10+2.3X
0.2二23+0.46二23.46;(6)21.364-0.2-25.9=106.8-25.9=80.9・17.【解答】
解:
(1)28.4X99+28.4=28.4X(99+1)=28.4X100=2840
(2)3.6X201=3.6X(200+1)=3.6X200+3.6X1=720+3.6=723.6(3)0.94X2.5-0.45=2.35-0.45=1.9(4)4X0.8X12.5X2.5二(4X2.5)X(0.8X12.5)=10X10=100(5)17.5三0.25X17+13=70X17+13=1190+13=1203(6)15.58H-8.2-0.72=1.9-0.72=1.1818.【解答】解:
(1)1.25X2.5X0.8X43=1.25X0.8X2.5X43=1X2.5X43=107.5;
(2)104-0.24-2.5=10^(0.2X2.5)=10^-0.5=20;(3)8.4—0.21.一0.5二40*0.5二80;(4)64X4.5+3.6X45=64X4.5+36X4.5=(64+36)X4.5=100X4.5=450;(5)1.25X3.2X0.8=1.25X0.8X3.2=1X3.2二3.2;(6)14.5X102=14.5X(100+2)=14.5X100+14.5X2=1450+29=1479・19.【解答】解:
(1)0.34X101=0.34X(100+1)=0.34
X100+0.34X1=34+0.34=34.34;
(2)8.8X1.25=(1.1X8)X1.25=1.1X(8X1.25)=1.1X10=11;(3)2.94X63+3.7X2.94=2.94X(63+3.7)=2.94X10=29.4;(4)
21.9-9.28-10.72=21.9-(9.28+10.72)=21.9・20二1.9;(5)2.7+(11.2-2.7)X0.4二2.7+8.5X0.4二2.7+3.4二6.1;(6)1.5X[0.024-(2.1-2.09)]=1.5X[0.024-0.011=1.5X2=3.20・【解答】解:
①10.7-22.78*3.4=10.7-6.7=4
②5.5X17.3+6.7X5.5=5.5X(173+6.7)=5.5X24=132(3)3.764-0.44-2.5=3.764-(0.4
X2.5)=3.764-1=3.76④0.25X12.5X3.2=0.25X12.5X(4
X0.8)=(0.25X4)X(12.5X0.8)=1X10=1021.【解答】解:
(1)4.6X25=
(4+0.6)X25=4X25+0.6X25=100+15=115;
(2)3.75^-12.54-0.8=3.75^(12.54-0.8)=3.754-10=0.375;(3)2.5+7.5^4=2.5+1.875=4.375;(4)(3.2-1.4)4-0.18-1.8=1.84-0.18-1.8=10-1.8=8.2;(5)7.9X7.1+2.9X7.9=7.9X(7.1+2.9)=7.9X10=79;(6)(30.2-4.6X5)4-0.12=(30.2-23)4-0.12=7.24-
0.12=60.22.【解答】解:
(1)0.75X0.5X0.8=0.75X(0.5X0.8)=0.75X0.4=03;
(2)5.6X15.7+9.3X5.6=5.6X(15.7+9.3)=5.6X25=14X0.4X25=14X(0.4X25)=14X10=140;(3)50.4X1.9-1.8=95.76-1.8=93.96.23.【解答】解:
①2.4-0.25X60=2.4-0.04X60=2.4-2.4=0②0.25X6.8X40二(0.25X40)X
6.8=10X6.8=68③5.52-0.55-0.45=5.52-(0.55+0.45)=5.52-1=4.52
40.49X7.2・7.2X0.39二7.2X(0.49-0.39)=7.2X0.1=0.7224.【解答】解:
(1)
4X0.8X2.5X12.5=(4X2.5)X(0.8X12.5)=10X10=100
(2)1x14+87x1-
55
A=Ax(14+87-1)=-1X100=80(3)(§+2)X42X42+-?
-X42=35+12=475556767
(4)2.25X4.8+77.5X0.48=2.25X4.8+7.75X4.8=(2.25+7.75)X4.8=10X4.8=4825.【解答】解:
(1)13.73+6.274-0.3=13.73+20.9=34.63;
(2)184-0.44-2.5=184-(0.4X2.5)=184-1=18;(3)0.75X99+0.75=0.75X(99+1)=0.75X100=75;
(4)2.85X5.35+2.85X4.65=2.85X(5.35+4.65)=2.85X10=28.5;(5)1.5X0.44-1.5X0.4=1.54-1.5X0.4X0.4=1X0.4X0.4=0.4X0.4=0.16.26.【解答】解:
(1)28.4X99+28.4=28.4X(99+1)=28.4X100=2840;
(2)3.6X201二3.6X(200+1)
=3.6X200+3.6X1=720+3.6=723.6;(3)0.94X2.5-0.45=2.35-0.45=1.9;(4)4X0.8X12.5X2.5=(4X2.5)X(0.8X12.5)=10X10=100;(5)17.5F0.25X17+13=70X17+13=1190+13=1203;(6)1.25X8.08=1.25X(8+0.08)=1.25X8+1.25X0.08=10+0.1=10.1.27.【解答】解:
①2.45-(1.45+0.89)=2.45-1.45-0.89=1
・0.89二0.11②1.25X1.7X0.8=1.25X0.8X1.7=1X1.7二1.7③5.3X0.82-0.82X0.3=0.82X(5.3-0.3)=0.82X5=4.1④3.6H-[12X
(0.53-0.45)]3.64-124-(0.53-0.45)=0.34-0.08=3.7528.【解答】解:
(1)
125X32X2.5=125X(4X8)X2.5=(125X8)X(4X2.5)=1000X10=10000;
(2)2.6X(3.4+1.6)=2.6X5=13;(3)6.7X5.5+5.5X33=(6.7+3.3)X5.5=10
X5.5=55;(4)36X99=36X(100・1)=36X100-36X1=3600-36=3564;(5)9.07-2.2-7.8=9.07-(2.2+7.8)=9.07-10=-0.93;(6)17.64-44-2
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