小数除法计算300道脱式运算+简算含答案docx.docx

1、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) X0.816 - 5.32 - 4.683.7X0.125+6.3 840.8+14.74- (14.6 - 12.5)0.72+9.6 一 3.22.用简便方法计算.3.7X4.5 - 4.4X3.70.25 X 0.25 X 4 3.84 - 1.9+0.16-1.19 - 7宁2.5X0.45.5X 0.672 (2+2.2)3.用递等式计算，能简算的要简算.934-3.14-0

2、.328.7 7X4.5 9.6十(15.4 - 12.2) 4.6X 1.2+2.8X4.64计算下列各题（能用简便算法的要用简便算法）.(2.3+1.052.1) X2.59.18 (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.12.5X0.5X8 17.5十(5.7 - 3.2) 48.77 - 32.768.410.252.50.4 18.1 - 2.8X4.63.01X101 - 30.1X0.1.6.脱式计算，能简算的要简算.4.82.042.4 1.1 (22F5)25 一 40X0.472+0.90.12517374-0.45 - 3.864

3、-0.19.07 - 22.784-3.4+3.7.7.用递等式计算,能简算的要简算10.01X101 - 10.010.11X1.8+8.2X0.11&递等式计算（能简算的要简算）6.5X99 4.65 - 2.55 - 1.45 2.2X0.25+2.8X0.25 0.25X6.82X4.9.计算下面各题，能简算的要简算.102X4.5 8X (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+11.33 2.74X 9.5+0.5X 2.7 (2400 - 480X2.5) 4-1.616.8X10.

4、1 1.25X88 6.87X 404- (3.49 - 3.09) 脱式计算(能简简的要简算)2.8+0.2 - 2.8+0.2 3712.54-0.8 1.25X (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.5.5 X 17.3+6.7 X 5.5 3.760.42.5 0.25 X 12.5 X 3.2.21递等式计算，能简便计算的要简便计算.4.6X25 3.7512.50.8 2.5+7.5V4(3.2 - 1.4) 0.18 - 1

5、.8 7.9X7.1+2.9X7.9 (30.2 - 4.6X5) 0.12.22.下面各题，怎样简便就怎样计算.0.75X0.5X0.8 5.6X15.7+9.3X5.6 50.4X1.9 - 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 ) 1.25 X 1.7 X 0.8 5.3 X 0.82 - 0.82 X 0.33.6 12X (0.53 - 0.45) 36X999.07 - 2.2 - 7.817.6F4 2.529 计算下面各题，2.5X0.27X4能简算的要简算.0.63X10

6、10.78+0.22530脱式计算(能简便的用简便计算).1.6X (2.25+10.51.5) 74X57+43X74 0.6 (6.1 - 4.6) X0.831.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)0.75X4X0.25X4 6.3X10.1 15.584-8.2 - 0.72 4.536一0.8一 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

7、.6.8X 0.46+0.54 5.4 X 23+5.4 X 7.76.939.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 - 12.4X5 18.5 - 3.21 - 4.79 8.4+3.8+1.6+6.20.25X17.3X0.4 7.2 X (10+0.1) 3.54X0.29 - 0.29X2.5445计算下列各题，怎么简便就怎么算.0.125X328.80.254-456.5 X 99+56.50.78X1019.9 - 2.07一 2.312.75一 14.6 - (1.3+8.2).46.计算，能简算的要简算.47.脱式

8、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：7.29X4.6+46X1.271 =7.29X4.6+4.6X 12.71= (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 =3.7X 1+6.3X丄二(3.7+6.3) X丄=10X丄=；8 8

9、8 8 4 40.8+14.7 4- ( 14.6 - 12.5 ) =40.8+14.7 4- 2.1=40.8+7=47.8 ； 0.72+9.6 4- 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

10、=7.88； (5) 5.5X 0.6724- (2+2.2) =5.5X 0.6724-4.2 =5.5X 0.16=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) 4.6X 1.2+2.8X4.6=4.6X (1.2+2.8) =4.6X4=18.4 (4)934-3.14-03=304-0.3=100 4.【解答】解：(1) (4.15+0.65) X0.9=4.8X0.9=4.32；(2)9.06X 14.7+5.3X9.06=9.06X (14.7+5.3) =9.06X20

11、=181.2； (3) (2.3+1.05 4-2.1) X2.5二(2.3+0.5) X2.5=2.8X2.5=7； (4) 9.184- (5.9 - 2.3) X0.25 =9.18 4- 3.6X0.25 =9.184-0.9=10.2. 5.【解答】解：(1) 12.5X 0.5 X 8=12.5 X 8X 0.5=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； (

12、5) 18.1 - 2.8X4.6=18.1 - 12.88=5.22； (6) 3.01 X 101 - 30.1 X0.1=3.01 X (101 - 1) =30.1X100=30100. 6.【解答】解：(1) 4.8三2.04 = 2.4二48一2.4F2.04二2宁2.04二空(2) 1.14- (22 = 5) =1.14-22X5=0.05X5=0.25 (3) 25宁40X0.4二25X 510.440=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

13、.07 - 22.784-3.4+3.7=9.07 - 6.7+3.7=2.37+3.7=6.07 7.【解答】解：(1) 10.01X101 10.01=1001X (101 =10.01X100=1001. (2) 0.11X1.8+8.2X0.11=0.11 X (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) =12.05 4-1=12.05 8【解答】解：6.5X99二6.5X (100 - 1) =6

14、.5X100 - 6.5=650 -6.5=643.54.65 - 2.55 - 1.45=4.65 - (2.55+1.45) =4.65 - 4=0.652.2X0.25+2.8 X0.25= C2.2+2.8) X0.25=5X0.25=1.250.25X6.82X4二(0.25X4) X6.82=1 X 6.82=6.82 9【解答】解： 102X4.5=( 100+2) X4.5=100X4.5+2X4.5=450+9=45928X (20 - 1.25 ) =8 X 20 - 8 X 1.25=160 - 10=1508.3+8.3 X 99 二8.3 X (1+99 )=8.3

15、X 100=830 (1.25+12.5+125 ) X 8=1.25 X 8+12.5 X 8+125 X 8=10+100+1000=110+1000=1110 10.【解答】 解： 2.64+8.67+7.36+11.33=(2.64+7.36) + (&67+11.33) =10+20=30(2)2.74 X 9.5+0.5 X 2.7=26.03+1.35=27.383(2400 480X2.5)一 1.6二(2400 - 1200)1.6=12001.6=750 16.8X 10.1 二 16.8X (10+0.1) =16.8 X 10+16.8 X 0.1=168+1.68=1

16、69.68 1.25 X 88二 1.25 X ( 80+8 ) =1.25 X 80+1.25 X 8=100+10=110(6)6.87 X 40 -r ( 3.49 - 3.09 )二6.87 X 40 4- 0.4二6.87X 100=687 11 【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) 3712.54-0.8=374- (12.5X0.8) =37-10=3.7(3) 1.25X (10+0.8) =1.25 X 10+1.25 X 0.8=12.5+1=13.5 ( 4 ) 10.8 - 3.

17、8 X 0.4 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=0.3 12.【解答】 解：(1) 4.054-0.9+5.5=4.5+5.5=10 (2) 3.67X10.1 - 3.67X0.1=3.67 X (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=26.75 13.【解答】解:3.74-2.54-0.4=3.

18、74- (2.5 X0.4)二3.7*1 二3.7 0.25X 1.25X32=0.25X 1.25X (4X8) = (0.25X4) X (1.25X8) =1X10=10 9.83 X 1.5+0.617 X 15=9.83 X 1.5+6.17X1.5=1.5X (9.83+6.17)=1.5X16=24 14【解答】解： 12.13+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)7.8 X 1.01=7.8 X (1+

19、0.01) =7.8 X 1+7.8 X 0.01=7.8+0.078=7.878 9.4X3.2+6X0.32=9.4X3.2+0.6X3.2=3.2X (9.4+0.6) =3.2X10=32 12.5X3.2=12.5X (8X0.4) =12.5X8X0.4=100X0.4=40 13.84- (1.38X2) =13.84-1.382=104-2=5 15.【解答】解：432.5254-0.4=432.54- (25X0.4) =432.5 4-10=43.25 1.25 X 3.2 X 2.5J.25 X (8X0.4) X2.5= (1.25X8) X ( 0.4 X 2.5)

20、=10X1=100.81X99+0.81 二0.81 X (99+1) =0.81X100=815.9 X 10.1 =5.9 X ( 10+0.1 ) =5.9 X 10+5.9 X 0.1=59+0.59=59.59 100 - 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=0.9 16.【解答】解：(1) 0.75X18三0.15 =0.75H-0.15 X 18=5 X 18=90；(2)9.34-0.1254-8 二9.3一 (0.125X8) =9.34-1=9.

21、3； (3) 1.78X99+1.78=1.78X (99+1)=1.78X100=17& (4)4.7X4.28+5.3X4.28 =(4.7+53) X4.28=10X 4.28=42.8 ； ( 5 ) 2.3 X 10.2 =2.3 X ( 10+0.2 ) =2.3 X 10+2.3 X0.2二23+0.46二23.46； (6) 21.364-0.2 - 25.9=106.8 - 25.9=80.9 17.【解答】解：(1)28.4 X 99+28.4=28.4X (99+1)=28.4X 100=2840(2)3.6X 201=3.6X (200+1) =3.6X 200+3.6

22、X 1=720+3.6=723.6 (3) 0.94X2.5 - 0.45=2.35 - 0.45=1.9 (4) 4X 0.8X 12.5X2.5二(4X2.5) X (0.8X 12.5)=10X 10=100 (5) 17.5三0.25X 17+13=70 X 17+13=1190+13=1203 (6) 15.58H-8.2 - 0.72=1.9 - 0.72=1.18 18.【解答】 解：(1)1.25 X 2.5 X 0.8 X43=1.25 X 0.8X 2.5 X43=1 X 2.5 X43=107.5； (2) 104-0.2 4-2.5=10 (0.2X 2.5) =10-

23、0.5=20； (3) 8.4 0.21.一0.5二40*0.5二80； (4) 64 X4.5+3.6X45=64X4.5+36X4.5= (64+36) X4.5=100X4.5=450； (5) 1.25X3.2 X 0.8=1.25 X 0.8X 3.2=1 X 3.2二3.2； (6) 14.5 X 102=14.5 X (100+2 ) =14.5 X 100+14.5 X 2=1450+29=1479 19.【解答】解：(1) 0.34X 101=0.34X (100+1) =0.34X 100+0.34X 1=34+0.34=34.34； (2) 8.8X1.25= (1.1X

24、8) X 1.25=1.1 X (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=1.5 X 2=3. 20 【解答】 解： 10.7 - 22.78*3.4 =10.7 - 6.7=45.5

25、X 17.3+6.7X5.5=5.5X (173+6.7)=5.5X 24=132(3)3.764-0.44-2.5=3.764-(0.4X 2.5) =3.764-1=3.76 0.25X 12.5 X 3.2=0.25 X 12.5X (4X0.8) = (0.25X4) X (12.5X0.8) =1X10=10 21.【解答】解：(1) 4.6X25=(4+0.6) X25=4X 25+0.6X 25=100+15=115； (2) 3.75-12.54-0.8=3.75 (12.5 4-0.8) =3.754-10=0.375； (3) 2.5+7.54=2.5+1.875=4.37

26、5； (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) =7.9 X 10=79 ； ( 6 ) ( 30.2 - 4.6 X 5 ) 4- 0.12= ( 30.2 - 23 ) 4- 0.12=7.2 4-0.12=60. 22.【解答】解：(1) 0.75X0.5X0.8=0.75X (0.5X0.8) =0.75X0.4=03；(2)5.6X 15.7+9.3 X 5.6=5.6X (15.7+9.3) =5.6X 25=14X0.4X 25=14

27、X (0.4X 25) =14X10=140； (3) 50.4X1.9 - 1.8=95.76 - 1.8=93.96. 23.【解答】 解：2.4 - 0.2 5 X 60=2.4 - 0.04 X 60=2.4 - 2.4=00.25 X 6.8 X 40二(0.25X40) X6.8=10 X 6.8=68 5.52 - 0.55 - 0.45=5.52 - ( 0.55+0.45 ) =5.52 - 1=4.5240.49X7.2 7.2X0.39二7.2X (0.49 - 0.39)=7.2X0.1=0.72 24.【解答】解：(1)4X0.8X2.5X12.5= (4X2.5)

28、X (0.8X12.5) =10X10=100 (2) 1x14+87x1-5 5A=Ax (14+87 -1) =-1X100=80 (3) (+2) X42 X42+-?-X42=35+12=47 5 5 5 6 7 6 7(4) 2.25X4.8+77.5X0.48=2.25X4.8+7.75X4.8= (2.25+7.75) X4.8=10X4.8=48 25.【解答】解：(1) 13.73+6.274-0.3=13.73+20.9=34.63； (2) 184-0.44-2.5=18 4- (0.4X2.5) =184-1=18； (3) 0.75X99+0.75=0.75X (99

29、+1) =0.75X100=75；(4) 2.85X5.35+2.85X4.65=2.85X (5.35+4.65) =2.85X10=28.5； (5) 1.5X0.4 4-1.5 X 0.4=1.54-1.5 X 0.4X0.4=1 X 0.4X 0.4=0.4X 0.4=0.16. 26.【解答】解：(1)28.4X 99+28.4=28.4X (99+1)=28.4X100=2840； (2) 3.6X 201 二3.6X (200+1)=3.6X 200+3.6X 1=720+3.6=723.6； (3) 0.94X2.5 - 0.45=2.35 - 0.45=1.9； (4) 4

30、X0.8X12.5X2.5= (4X2.5) X (0.8X12.5) =10X10=100； (5) 17.5F0.25X 17+13=70X 17+13=1190+13=1203； (6) 1.25X8.08=1.25X (8+0.08) =1.25X8+1.25 X0.08=10+0.1=10.1. 27.【解答】解：2.45 - (1.45+0.89)=2.45 - 1.45 - 0.89=1 0.89二0.11 1.25 X 1.7 X 0.8=1.25 X 0.8 X 1.7=1 X 1.7二 1.75.3 X 0.82 - 0.82 X 0.3=0.82 X (5.3 - 0.3

31、) =0.82X5=4.1 3.6H- 12X(0.53 - 0.45) 3.64-124- (0.53 - 0.45) =0.34-0.08=3.75 28.【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) X 5.5=10X5.5=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