小數(shù)乘除法口算

1、小數(shù)乘除法口算1.5 4=3.8 2=1.8 O.5=2.5 二7.2 TO.9=8TO.5=0.134=1.6 O.2=O.32T16=5.4 TO二9.3 TO.3=2.5T1O=0.180.3=4TO.4=6.3T2.1=4.21OOO=O.45TO.5=O.92T4=O.45TO.15=O.2 TO.O1=8OT1.6=3.6TO.1=O.9 6=6.21.7=8.5 1OO=2.1 O.3=O.56T14=8.5T1.7=7O.O8=1.6TO.8=3.2 T1OO=1.87 O=6.3T9=1.2TO.3=O.245=O.15 8=O.49 T7=O.2 O.5=7.2TO.6=O

2、.O425=6OO.5=4.2T1.4=O.O96TO.O3=O.O51.6=3.9T3.9=84T4.2=O.5 1.1=OT6.81=1OOOO.756=O.8 O.5=1.47 O.4=O.51OO=6TO.12=0.4 0.25 =OTO.25=1.25 4=3.6T1.2=1TO.O1=4O.25=0.72T0.9=1.25 8=O.4T8=3T 8=5.6 - 1.4=9.132.1 =0.6X0.7=4.8 - 0.4=1 -0.25 =10.2+0.02=4.4 -4=0.470.34=0.15+0.7=2.6 - 13=9.6-0.2=6.7+2.5=3.8 -1.9=0.5

3、6-0.8=10.2+0.2=7.2 - 0.4=9.13X0=9.2-6.1=1-0.25=53.4-10=8.5-5=0.78 - 6=5.51.8=3.2-3.2=2.4-24=0.36-0.4=3.7+2.3=5.5-11=60X 0.8 =2.5X100=6.6-0.6=1 -0.25 =3.12-0.32=0.18-2=10.62=2+2.8=34- 0.2=70.23 =3.8-2.9=3.5 X 4=4.3-2.5=0.35+0.5=2.4 0.6 =0.17+0.06=0.35+0.63=0.62 0.32 =1.02-0.09=3.5-70=9.8 X 0.5 =720-8

4、00=3.1+3=0.25 X 4=0.17+0.6=3.8+0.38=9.46 X 10=0.83-0.6=7.5-25=12-0.6=17X300=3.8+1=0.4X0.5=0.98-0.09=0.95-0.05=4.6 X 5=0.2+0.78=4.5+7.8=3.1+0.3=0.52+0.4=3.5+4.8=3+0.3=71.2=3.5+2.4=6.3 =0.25 100=5+0.07=4.5-0.4=3.4-2.8=1-0.61=9.5-5=0.6-0.37=0.47+0.23=1.1 9=0.052 10=0.25+0.75=9.53-1.53=10+0.08=3.7+0.33=

5、9.5-0.5=1-0.75=0.51+0.33=3.5+2.4=0.5 1000=1-0.6=1-0.95=7.82+0.3=8-4.6=0.3+0.27=13.5+6.5=5.8-3.6=0.47+0.13=3.05 100=0.52+0.4=4.5+4=1.2-0.8=6.45+5.5=4-0.6=21.6-12.6=4.5-1.3=0.95+0.05=6300=3.4-2.8=2.5+3.2=0.83-0.5=9.53-1.53=0.74+0.16=0.76+0.14=8.8-6.7=4.8 蟲(chóng)0二80000=10+0.08=53 勻00=2.7+0.4=9.5-7.3=5.1+2.3

6、=0.72-0.42=7.2+0.8=1.25 80=010.5=7.82+0.3=0.78 勻0二0.92-0.2=8.8-6.7=1-0.95=125X 7125=2.1 -7-0.1=3.4-2.8=0.65X 5=5X2.1=0.96-0.35=0.1 X 7=2.5X4X0.5=9.53-1.53=32.5 - 0.5=50X0.04 =0.25+0.75=2.58 - 0.2=3.4-0.1=1.2-0.8=0.7 7.32=6.9-3=0.83-0.5=480199=100X2.5X0.4=2.7+0.4=63 - 0.7=1.26 0.74=0.77 - 11 =4X 1.8=

7、2.341.34=3.56 X 10=0.3 4.44=6.3-9=0.9 X 7=2.01 X 7=8.2-1.9=30.5 - 5=10-8=1.26 0.74=8 X 0.04 3=0.8 7.62=9- 5=5.3X0.1=0.12X8=10.250.75=41.221=4.2 -0.1=1.60.9=5.66 - 0.2=1.6X3=3.440.56=8.4 - 0.7=1.2 X0.6=1.2-4=50198=100-200=3.1 2.5 0.9=0.1 X 9.02=6.2 X0.3=6.82.9=110-100=0.6 X0.7=4.20.8=1.01 X 9=2.8 -70

8、=7.34-2=3.1 X10=0.9 X0.4=9.7X20.3X2=6.5 5.6=9.655=1.6 -0.04=0.24x 0.5=1.85x 0.1=1.2 x 0.7=0.09-3=4.9 -7=0.860.6 =0.580.41 =4.2 x 2=1.1 x 3=0.32+0.21 =7.2 +2.8=10x 0.35=0. 06 x 100=0.570.27=0.860.4 =0.74+0.54 =0.32+0.21=12.3-10=6.53-100=125X 4=0.6 x 9=5.4 -1.8=38x 0.01 0.02=2.7 - 30=1.01 x 5=510-100=

9、(1.2 0. 6) x0.1=7. 4 2. 4=3.7 4.2=2.4 x3=34x 567x 0=3.2 - 0.04=0.54 - 0.9=0.4 x2.5=3.6 5.8 4.2=0.15 - 0.3=3.18x 100=41x 0.4=0.86 - 0. 2=0.085=1.8 x30=80x 0.4=0.03 - 0.01 + 0.3二1.2 -6=6.4 -4=3.6 -40=(1.5 + 0.5) - 2=3.2 -1.6=70.16=9.9 -3=9.8 2.9 3.1=8x20-5=0.8 x1.25x15=4 3.2 =10.99 =4.1 +4.14 =0.6 + 0

10、.8 =0.81 - 0.9=1-0.01=0.9 -0.45=0.48-0.24=1.8 +0.9 =0.28+0.2 =12- 100=0.06X0.9=7.51+1.49=0.16 - 10=0.05X1.6=4.6+3=1 0.42 =0.5 X0.05=0.8X 0.25=5.2 + 3.5 =0.3 X0.03=110X 0.1=0.61 0.3 =3.6 七.3二15- 0.5=0.8 0.08 =0.54 七.6二0.32-0.004=3.6 - 6=0.12 吒）.4二8.1 - 0.3=8.4 -4=0.45 七.5二0.92X 0=0.64 - 8=0.25X 4=0.1

11、 X 0.001=0.6 X 8=2.5 X 0.4=0.8-0.02=2.4 - 8=1.25 X 0.8=3.6-2.4=0.06 - 3=12.5X 0.8=0.2X 1.8=20X 0.5=8.5 2.9 =4-2.56=1000X 0.09=4.8 4=1.57+4.02=6.6 + 1.4 =3.8 +4.02 =9.94-5.83=3.9 2 =3.42+0.48=2.4X 3=0.837 0.837 =3.7 -0.1 =24X 0.03=7.3+1.7=2-0.2=5.6+0.24=0.35 參1.2 -0.03=14.7 + 3.89 4.7 =2.8X4=0-1.8=4.

12、56 + 9.1 + 0.44 =0.5X0.5=1.080.8=4.2-3.5=2.5X10=20.01 =1.76 + 2.83 + 0.24= 6.26 6.4 -8=0.6 0.7=3.651.35=0.1 9.2=2.8870=1.74+3.26=11 8100=0.9 0.4=1.2-0.9=1.01 9=2.1 8780.1=0.54 七.6二3.1 10=5 2.1 2.1=0.26 0.3=0.655=2.5 4 0.5=1 弋.05二0.1 7=50 0.04420=20 0.4=32.5 80.5=3.480.121=2.8+10.2=2.5880.2=100 2.1 0

13、.03=7-0.9=0.7 7.32=6.3 89= 9 85=0.55+0.3=6.3 87=4.3 + 2.7 =0.8+0.2=8 1.8=0.75 + 0.25 =160.4=0.3 4.44=4 0.26 =0.145=2.08 7=0.35 + 2.7 =2.54=1088=4.6 1.9 =15.3-10=0.8 7.62=0.83 0.3 =3.3+7=0.12 8=3 + 0.05 =610=4.2 80.1=7.2 3.8 =0.86+2.14=1.6 3=0.07 + 0.6 =0.37+4=1.2 0.6=1.39 0.39 =3.2 七.8二1008200=10 5.

14、4 =0.45+0.55=6.2 0.3=8.281.9=1.2 - 4=800x 0.4=6.1 2.08=3.44 0.56=1.2 -6=5.2x8=6.8 2.9=3.6 -40=7.2-40=0.6 x 9=3.2 -1.6=4.3-0.01=4.20.8=70.16=0.06x 0.8=7.34 - 2=4.080.3=6.525.12=5.4 -1.8=9.3 3.5=3.61.8=2.7 - 30=190-0.2=0.54x 4=7.342.14=3.6-0.3=0.72-8=1.01 x 5=1.2x0.4=9- 2=510-100=50.5-5=50x 0.3=3.744.

15、26=4.2 0.8=0.12x100=2.4x8=0.8 x 0.4=62.09=3.2 - 0.04=0.8 -0.1 x 0.5=1.8x4=0.54 - 0.9=2.8-0.7x20=126.2=0.4x2.5=555-0.5=7x 0.8=0.16 - 0.3=3.26-2x0.01=10.1 x 6=3.18x100=（5.1 2.7） -0.6=9.6 0.7 0.3=41x 0.4=7.43.6=1.25 x 8x 0.74=0.86 - 0.02=2.5 x 40=1.82.26.4=0.085=1.35 x 20=0.6 x 5 0.4 x 5=1.8x30=0.56-0.

16、28=4.270.60.4=3.6 0.8 0.2=3.1 x 0.5=0.8-0.04=8.54 1.7 2.3=0.830.2=0.364x100=1.05 x 0.7=2.02x 9=16- 1.6=0.42 0.58=30.3 - 3=7.80.2=40.3 9=2.74 - 2=2.4-4.8=42.5 - 5=6-0.02=0.125x8=80 - 0.4=2.760.36=71.34=0.75x 0.2=0.06x 0.9=32x 0.25=7x 0.6=5.8 3.4=9x 0.36=7.2 - 0.5=320.7=0.37x 10=802.6=25x0.01=2.9 x 0.

17、6=7.86.65=4.1 x 0.5=0.8x0.7=4.02x 300=19.04- 2=5.32.9=9.8x10=0.740.24=2.813.5=12x 0.5=36.05- 5=17.22.8=6.1 - 2=4.7 1.9=8.4-4.2=6.83.2=3.46x 11=1.7x3=10032.5=3.2 -64=8.33.3=2.5 -25=8.1 -3=3.6 6.4=0.9 0.99=8.42.7=0.84-6=400-0.1 =24.32- 8=0.7x5=4.5x3=0.9 x0.6=5.5 3.6=500 x 1.2=8.3 3.3=6.1 - 2=12X 0.5=0

18、.4 x2.5=6.8 3.2=16-1.6=0.16 - 0.3=10032.5=5.4 -1.8=3.18x 100=2.5 -25=25x 0.04=41x 0.4=0.9 0.99=105.6=0.86 - 0.02=400-0.1=1.25 x 80=0.085=4.5 x 3=1.23 - 3=1.8 x30=3.1 x 0.5=82.6=800x 0.4=0.830.2=63 - 0.09=1.2 -6=2.02 x 9=6.2 - 0.2=3.6 -40=30.3-3=7.8 2.2=3.2 -1.6=2.74-2=5.4 - 0.9=70.16=6-0.02=0.44x 2=9.9 -3=2.760.36=0.25x 40=5.2 x 8=0.06x 0.9=0.2 x