小數(shù)加減乘除計算練習(共22套)

1、練習（一）4.8+ 6=0.9" 0.03=2.4 0.2=4.8+ 0.6=9& 0.3=25.片 6=22.8- 3=5.98 0.23=19.7& 5.2=3.81-7=32- 42=246.4 13=2.17- 0.7=0.4- 0.01 =5.3+6.7=5.4-3.6-1.4=3(X 0.01 =15 1.5=12.9-8.5=7.2< 0.4=2.8<1.4=8+2-8+2=286+198=314-202=526+301=223-99=0.4<5 2.5=0.8X 1.25=0.3< 3.6=0.3< 0.3=練習（二）2.

2、140.9=0.5+7.6=240 48=4200- 300=0.750.38=396+99=90 X 30=20X 35=10.2=32.25=1.57+3.43=286+199=18.54 9.9 =36X 99=2.40 2=48-0.6=0.240 0.2=4.8+ 6=0.92 0.03=2.400.2=4.8+ 0.6=9& 0.3=3.240 24=3.24- 0.24=3.24 2.4=2.40 2=48-0.6=0.240 0.2=3.215X 100=1.1X 0.2 =2.5X 0.4=50 x 0.04=0.16X 5=1.2x 0.5=123.9=4.2- 3

3、.5=2745673=0.9- 0.01 =練習（三）0.8x 10=0.6x0.8 =3.6x 0.4=80x 0.3 =1.782.2 =0.7- 0.01 =6倂 0.66=1.6+2.4x 0.3=0.3x 0.3=12 0.3=4.08x100=3x 0.9=12.5x 8=1.1x 9=9& 0.6 =2.5x 0.4=3.92.03=2.140.9=7.22.8=2.8片 0.7=練習（四）0.92X 0.4=0.2X 0.26=0.14X4=0.02X 0.1 =1.2X 0.3=0.2X 0.4=8.21.8=10035.22=2.3X 4=2.5X 0.4=2.4X

4、 5=0.22X 4=3.25X 0.5=0.90.52=3.99X 1=OX 3.52=12.5X 8=8- 10 =10-1.8-7.2=0.43+3.57=2.X5 4X 12=0.9X 0.8=7.5x-3x=a+3a+7a=1.05X 100=1- 0.5=0.96- 3=1.47- 0.7=5.4 6=X 10=0.56X100=3.78X 100=4- 0.8=2.5- 0.7=10.1- 3.3=練習（五）10.75-12.5=3.25X 9.04=12.5X 8.8=0.43X 0.28=6.45X 0.73=4.6X 0.6=8.9X 0.05=3.08X 0.43=1.5

5、X 26.7=5.22- 29=18.72 3.6=13.95 3.1 =8- 10=10-1.8-7.2=0.43+3.57=2.54X 12=0.9X 0.8=7.5x-3x=a+3a+7a=1.05X 100=1- 0.5=0.96- 3=5.4- 6=1.47- 0.7=128- 0.4=78-0.6=9.6- 3.2=65-0.05=0.35X 0.3=練習1.4X 5=六）2.8X 4=19.6+ 4=22.5X 4=0.396 1.2=0.75" 0.36=15.6X13=0.18X15=0.025X 14=3.06X 36=0.04X 0.12=3.84X 2.6=5

6、.76X 3=7.15X 22=90.75 3.3=3.68X 0.2=16S 0.13=1.55- 3.9=3.7X 0.016=13.76X 0.8=5.2X 0.6=8.4X 1.3=6.4X 0.5=4.48X 0.4=5.25X 5=35.4X 4.2=0.042X 0.54=0.76X 0.32=0.25X 0.046=7-0.25=練習2.5X 0.7X 0.8=七）82.5=16- 1.6=5.6X 1.0 仁0.360.64=64.32 16=43 0.1 =72&0.8=8.4- 4.2=13.89.9=2.4X 2.5-0.05X 0.8=2.560.37=12X

7、 2.5=1.23X 3=3.2 1.6=3.5 3.5X 3=19.6- 2=8.8- 2.2=0.75X 4=0.5X 0.8=8.4X 0.2=1.6X 0.2=7.2X 0.3=2.8X 0.3=03 0.15=1.8X 0.4=5.5 0.55=0.08< 100=練習（八）42 - 0.003=7刖 0.06=45- 0.005=81-0.03=73 0.002=1000- 1.25=10-2.5=120 0.024=7.5- 5=8.6+ 0.002=0.003& 3.6=8.6-2=2.5- 0.005=0.3& 0.0006=7.5- 2=6.3- 21

8、二82 0.0043=46-0.0023=8.4- 0.0084=1.2刖 3.2=9.8- 0.7=4.6- 0.023=0.009- 0.005=39-0.0003=133- .0007=5.02 0.5=123000-1.23=0.0012員 50=5.6- 700=760- 0.008=練習（九）9.5X 99=13.5X 0.98=0.1-0.047=0.29+ 2.9=3.4X 0.2=0.5片 19=63+124+76=7.09K 10.8=0.8< 7.09=9.5X 101二3.8X 10.1 =7.69< 101=3.8X 10.仁0.125< 72=7&

9、lt; 19+7=22.8- 3=5.98 0.23=19.7& 5.2=3.81-7=32- 42=246.% 13=2.17- 0.7=0.4 0.01 =5.3+6.7=5.4-3.6-1.4=3(X 0.0仁15 1.5=12.9-8.5=7.2< 0.4=2.8< 1.4=8+2-8+2=286+198=314-202=練習（十）1025 768+ 32=645-45X 12=10-2.87-7.13=0.96+9.X6 9.9=401X 19+284=640+128X 45=1.25X 8- 1.25=5.37X 0+4.63=2.5X 7.1X 4=16.12

10、X9916.12= 0.9=7.28X 99+7.28=4.3X 50X 0.2=64 2.64X 0.5=3.94+34.3X 0.2=8.9X1.1X4.7=2.7X 5.4X 3.9=3.6X 9.85-5.46=8.05X 3.4+7.6=6.58X 4.5X 0.9=70+50-50+70二練習(十一)13.7+0.98+0.02+4.3=18.63.470.53=72X 101-72=235X 28- 35X 28=2.6X 78+78X 7.4=7.26-(5.26-1.5)=8( (2.5+ 0.25=1.25X 0.8X 0.5-(1.5 + 0.25)X 4=0.12X 0

11、.5X 0.16=7.28X 99+7.28=4.3X 50X 0.2=543" 18 =102X 45-328=100-9036- 18=3.8X5.25+14.5=300-426"3 21=0.81"0.25+5.96=403" 13X 27=練習（十二）526+301=223-99=0.4X5 2.5=0.8X 1.25=0.3X 3.6=0.3X 0.3=10X 0.07=0.3X 1.4=0.05X 7=0.92X 0.4=0.2X 0.26=0.14X4=0.02X 0.1 =1.2X 0.3=0.2X 0.4=8.21.8=10035.22

12、=2.3X 4=2.5X 0.4=2.4X 5=0.22X 4=3.25X 0.5=0.90.52=3.99X 1=0X 3.52=12.5X 8=5.42.51.4=2.5X 1.25X 0.32=126.23.8=(180+20尸 5=1.7+0.43+3.3=75X 25X 4=250- 250- 5=4.8 4.8X 0.5=4.8X 100.仁4.85+0.35 1.4=40.5- 0.81X 0.18=2.13X 0X 8257=0.25X 185X 40=0.25X 39+0.25=6.81+6.81X 99=6.8X 0.75- 0.5=1.53+23.4- 7.2=練習(十三

13、)(1.250.125)X 8=56.5X 9956.5=0.87X 3.16+4.64=4.X (15 - 2.4)=6.81+6.81X99=2.5X (3.8X 0.04)=(8X5.27)X 1.25=0.25X 185X40=3.75 0.125- 2.75=1.2+3.2+0.8 =練習（十四）1X 0.66 寧 6 =21-27 2.7=5.4- (0.51-0.17)=0.78% 99+0.78=5.4X (7.26- 6.05)=8.7%7.4=12.5X 0.4X 2.5X 8=0.68( 5.2-3.5)X 1.25=(0.25+2.5+25)X 0.4=5-0.9X 0

14、.2+1.8- 0.5=6.4X 3.28+4.6X 二12.2+21-(7.3- 6.6)X 2.4=4.4X 0.8- 3.4X 0.8=(9.37+9.37+9.37+9.37%) 2.5=2.37X 6.3+2.37X 3.7=46% 0.33+54%0.33=1.93+2.7+2.07+7.3=26%15.7+15.7%24=(2.275 + 0.625% 0.28=85.07-(15.3-4.8)+5.369=40-(3.5- 2.75+0.86)=37X 25+268-67=練習（十五）(32+360+ 45)X 72=(7590+ 33- 14)+ 54=412+( 607-

15、36 X 14)10.5+ (5.2-3.5)=13.8- 8.7)+ 0.034=6.25+3.85-2.125+3.875=3.375+5.75+2.25+6.625=2.1X4.3+5.7X 2.1=3.375X 0.97+0.97X 6.625=6.54+2.4+3.46+0.6=95.6X 1.8+95.6X 8.2=1.5X 4.2- 0.75+ 0.25=3.27X 4 +3.27X 5.7=0.25X 80- 0.45+ 0.9=12.37-3.25-6.75=長 3.7=9.31-1.125-7.875=1.2X (9.6- 2.4)+ 4.8=1.5X( 10.0 15.6

16、 7.5)=4.7+3.91+(32-29.7)=9.2+9.728+3.2X1.5=練習（十六）16X 6.8+2.2X 16+16=0.4X 4.7X 2.5+(2.3+5.3)=400X (0.62+0.08)=8.583.69)X( 3.41.8) =30.6+( 4.5X 0.16) =3.12X(0.90.7+0.1) =2.4X0.751.25+2.5=8.48寧 0.8X 0.9=(2539.7片 0.3X 8.5=4.11-0.72X (3.38- 2.13)=(6.8 5.4)X 2.75 0.9=(227+ 254.68)X 0.5=(21.88+29.8)+ 7.6=(

17、3.44+20.5X 0.32尸 0.16=練習(十七)101X 0.32( 14.4X 0.05)=10.5+(5.14.4)+18.25=1025- 1125-4.5X 3.6=0.875X 36+4.05- 8.1 =630-( 2.98+6.5X 0.08)=(8.1 5.4)+ 3.685.7=0.54- (8.7+ 45.3)X 28.4=0.1+1+1+0.80.1=練習(十八)(1.25+ 6.4) 14.8曠 2.4=(4. 2.01 + 2.2)+ 4=58.8+( 0.6X 0.7)+ 0.02=10.47.79+(0.35+0.6) =3.6+( 1.2 + 0.5)X

18、 5=13.7X 0.25 3.7+ 4=3.6X 1.25+ 0.32- 0.4=0.8X (3.2- 2.99- 2.3)=2.5X (6+ 9.728 3.2)=5.2X (4.6+0.92X 0.04)=5.4+ (3.94+ 0.86)X 0.8=19.28+1.82+0.7=(37.62+20.76 + 0.042二練習(十九)(17.2-4.5X 3.6)- 0.32=(6.02 + 2.8 尸 0.4 - 2.05=3.27<( 80.5-9.8* 0.16)=(71.2- 71.2X 0.9)- 0.25=1.0刖(3.94+34.3X 0.2)=(4.25-4.25< 0.8)- 1.7=1.46<5+12.8-0.4<7.5=1.52- 1.6X 5+ 5.7=3.8+ (24-25<0.6)=(0.25 +0.125)- (0.75<0.4)=20-2.5<4-8=(4.8 4.8X 0.5)+ 2=0.8X(