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1、小数乘除法口算1.25 8=0.4 h8=3 + 8=3.8 2=7.2 0.9=1.6 0.2=9.3 63=4-0.4=0.45 0.5=0.2 0.01=0.9 6=2.1 0.3=7 0.08=1.87 0=0.24 5=0.2 0.5=60 0.5=0.05 X1.6=0.5 1.1=0.8 0.5=6t12=1.25 4=4 0.25=1.5 M=2.5 M=0.13 M=5.4 T0=0.18 0.3=4.2 M000=0.45 电15=3.6 61 =8.5 M00=8.5 +1.7=3.2 T00=1.2 63=0.49 T;0.04 25=0.096 03=84m.2=10
2、00 0.756=0.5 M00=00.25=1 也.01 =1.8 0.5=8t5=0.32 T6=2.5 T0=6.3 21 =0.92 *80T.6=6.2 +1.7=0.56 + 14=1.6 0.8=6.3 9=0.15 X 8=7.2 0.6=4.2 +1.4=3.9 3.9=0 + 6.81 =1.47 X 0.4=0.4 X0.25 =3.6 +1.2=0.72+0.9=5.6 -1.4=9.13+2.1 =0.6 X),7=10.2+0.02=0.15+0.7=6.7+2.5=10.2+0.2=9.2-6.1 =8.553.2-3.2=3.7+2.3=2.5 XI00=3.1
3、2-0.32=2+2.8=3.8-2,9=0.35+0.5=0.35+0.63=3.5 70=3.1+3=3.8+0.38=7.5 5=3.8+1 =0.95-0.05=4.8 -0.4=4.4 +4二2.6 -13=3.8 -1.9=7.2 -0.4=1-0.25=0.78-6=2.4 -24=5.5 -11 =6.6 -0.6=0.18-2=34-0.2=3.5 X4=2.4 -0.6 =0.62 -0.32 =9.8 X0.5 =0.25 X 4=9.46 X 10= 12-0.6 =0.4 X0.5 =1-0.25 =0.47 +0.34=9.6 -0.2 =0.56-0.8 =9.1
4、3 X0 =53.4 + 10=5.5 +1.8 =0.36-0.4 =60X0.8 =1-0.25 =1-0.62 =7-0.23 =4.3-2.5=0.17+0.06=1.02-0.09=72000=0.17+0.6=0.83-0.6=17 300=0.98-0.09=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=7X1.2=3.5+2.4=6.3 3=0.25 X100=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 X10=0.25+
5、0.75=9.53-1.53=10+0.08=3.7+0.33=9.5-0.5=1-0.75=0.51+0.33=3.5+2.4=0.5 M000=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 X100=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=63 T00=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 M0=80 T000=1
6、0+0.08=53 100=2.7+0.4=9.5-7.3=5.1+2.3=0.72-0.42=7.2+0.8=1.25 80=0X10.5=7.82+0.3=0.78 T0=0.92-0.2=8.8-6.7=1-0.95=125X7+125=2.1当书.1 =5 2.1 =2.5 4 0.5=50 0.04 =3.4 电1 =6.96100 2.5 0.4=1.26 +0.74=2.34 -1.34=6.3 +9=8.2 +1.9=1.26 +0.74=9 + 5=1-0.25 -0.75=1.6 -0.9=3.44 +0.56=1.2 +4=3.1 +2.5+0.9=6.8 -2.9=4.
7、2 -0.8=7.34+2=3.4-2.8=0.96-0.35=9.53-1.53=0.25+0.75=1.2-0.8=0.83-0.5=2.7+0.4=0.77 + 11 =3.56 X 10=0.9 X7=30.5+5=8 X 0.04 +3=5.3 X0.1 =41.2+21 =5.66+0.2=8.4 +0.7=501-98=0.1 X9.02=110+100=1.01 X9=0.65 5=0.17=32.5+0.5=2.58+0.2=0.7 +7.32=480 199=63 + 0.7=4X1.8=0.3 +4.44=2.01 X7=10 + 8=0.8 +7.62=0.12 8=4
8、.2 61 =1.6 3=1.2 0.6=100200=6.2 0.3=0.6 0.7=2.8 寸0=3.1 X10=0.9 0.4=9.7 X2+0.3 X2=125X4=80X0.4=6.5 -5.6 =9.65-5=1.6 +0.04=0.24 X 0.5=1.85 X0.1 =1.2 X0.7= 0.09+3=4.9 +7= 0.86-0.6 = 0.58-0.41 =4.2 X2=1.1 X3= 0.32+0.21 =7.2 +2.8 =10X0.35=0. 06 X 100=0.57 -0.27 =0.86-0.4 =0.74+0.54 =0.32+0.21 =12.3 + 10=
9、0.6 X9=5.4 +1.8=38X0.01 +0.02=2.7 +30=1.01 X5= 510+100=(1.2 +0. 6) X0.1 =7. 4 -2. 4=3.7 +4.2=2.4 X3= 34X567X0= 3.2 +0.04= 0.54+0.9= 0.4 X2.5=3.6 +5.8 +4.2=0.15+0.3=3.18 X 100=41X0.4=0.86+0. 2=0.08+5=0.03+0.01 +0.3=1.2 +6=6.4 +4=3.6 40=(1.5 +0.5) +2=3.2 +1.6=7-0.16=9.9 3=9.8 -2.9 -3.1 =8 205=0.8 M.25
10、 X15=4-3.2 =1-0.99 =4.1 +4.14 =0.6 +0.8 =0.81 +0.9=1+0.01 =0.9 +0.45=0.48 0.24=1.8 +0.9 =1.8 X30=0.28+0.2 =6.53 + 100=12+100=0.06 0.9=7.51+ 1.49 =0.05 X1.6=0.5 0.05=0.3 0.03=3.6 63=0.54 电6=0.12 电4=0.45 电5=0.25 X 4=2.5 X0.4=1.25 X 0.8=12.5 X 0.8=8.5 -2.9 =4.8 -4 =3.8 +4.02 =3.42 +0.48 =3.7 +0.1 =2 +
11、0.2=1.2 +0.03=0 1.8=1.08-0.8 =0.16 + 10=1 0.42 =5.2 +3.5 =0.61 -0.3 =0.8 -0.08 =3.6 +6=8.4 +4=0.64+8=0.6 X8=2.4 +8=0.06 3=20X0.5=1000X 0.09=6.6 +1.4 =3.9 -2 =0.837 0.837 =7.3 +1.7 =0.352.8 M=0.5 0.5=4.6 + 3=0.8 X 0.25=110X0.1 =15 + 0.5=0.32 +0.004=8.1 +0.3=0.92 X 0=0.1 x 0.001 =0.8 +0.02=3.6 +2.4=0.
12、2 X 1.8=4-2.56=1.57+4.02=9.94-5.83=2.4 X 3=24X0.03=5.6+0.24=14.7 +3.89 -4.7 =4.56 +9.1 +0.44 =4.2-3.5=2.5 M0=2-0.01 =1.76 + 2.83 + 0.24=6.266.4 8=0.6 X0.7=0.1 9.2=11T00=1.01 9=3.1 M0=0.65 5=0.17=32.5+0.5=2.58+0.2=0.7 +7.32=6.3 +7=8X1.8=0.3 +4.44=2.08 X 7=10 + 8=0.8 +7.62=0.12 X8=4.2 +0.1 =1.6 X3=1.2
13、 X0.6=100 + 200=3.65 1.351.74+3.26=1.2-0.9=0.54 电6=0.26 0.3=10.05=20 0.4=2.8+10.2=7-0.9=0.55+0.3=0.8+0.2=16t4=0.14 5=2.5 M=15.3-10=3.3+7=6T0=0.86+2.14=0.37+4=3.2 68=2.8 +70=0.9 X0.4=2.1 +7 + 0.1 =5X2.1 +2.1 =2.5 X 4X0.5=50X0.04 +420=3.4 +0.1 -21 =100X2.1 x 0.03=6.3 +9= 9+5=4.3 +2.7 =0.75 +0.25 =4-0.
14、26 =0.35+2.7 =4.6 1.9 =0.83-0.3 =3 + 0.05 =7.2 -3.8 =0.07+0.6 =1.39 -0.39 =10-5.4 =0.45+0.55=6.2 X0.3=8.2 +1.9=1.2 +4=800X0.4=6.1 -2.08=3.44 +0.56=6.8 -2.9=0.6 X9=4.2 -0.8=7.34+2=5.4 +1.8=2.7 30= 7.34-2.14=1.01 X5= 510+100=3.74 +4.26=2.4 X8=3.2 +0.04=0.54+0.9=0.4 X2.5=0.16+0.3=3.18 X 100=41X0.4=0.86
15、 +0.02=0.08+5=1.8 X30=1.2 +6=3.6 +40=3.2 +1.6=7-0.16=4.08+0.3=9.3 -3.5=190 + 0.2=3.6 +0.3=1.2 X0.4=50.5+5=4.2 -0.8=0.8 X0.4=0.8 +0.1 X0.5=2.8 +0.7 X20=555 + 0.5=3.26+2X0.01 =(5.1 -2.7) +0.6=7.4 +3.6=2.5 X40=1.35 X 20=0.56 +0.28=5.2 X8=7.2 +40=4.3 +0.01 =0.06 X 0.8=6.52-5.12=3.6 + 1.8=0.54 X 4=0.72+8
16、=9 + 2=50X0.3=0.12 X 100=6-2.09=1.8 X 4=12-6.2=7X0.8=10.1 X6=9.6 -0.7 -0.3=1.25 X 8X0.74=1.8 +2.2 +6.4=0.6 X 5 + 0.4 X 5=4.27-0.6 -0.4=3.6 + 0.8 + 0.23.1 X0.5=0.8 -0.04=8.54-1.7-2.3=1.05 X 0.7=0.42 +0.58=40.3-9=42.5-5=80-0.4=0.75 X 0.2=7X0.6=7.2 -0.5=80-2.6=7.8 -6.65=4.02 X 300=9.8 X 10=12X0.5=6.1 -
17、2=6.8 +3.2=100-32.5=2.5 -25=0.9 + 0.99=400-0.1 =0.83+0.2=2.02 X 9=30.3-3=2.74-2=6-0.02=2.76 -0.36=0.06 X 0.9=5.8 +3.4=32 + 0.7=25X0.01 =4.1 X0.5=19.04-2=0.74 -0.24=36.05 + 5=4.7 +1.9=3.46 X 11 =3.2 -64=8.1 -3=8.4 -2.7=24.32 + 8=0.364 X1OO=16-1.6=7.8 +0.2=2.4 -4.8=0.125 X8=7-1.34=32X0.25=9X0.36=0.37
18、X 10=2.9 X0.6=0.8 XO.7=5.3 -2.9=2.8 + 13.5=17.2+2.8=8.4 -4.2=1.7 X 3=8.3 -3.3=3.6 +6.4=0.84-6=0.7 X5=4.5 X3=0.9 X0.6=5.5 +3.6=500X1.2=8.3 -3.3=6.1 +2=12X0.5=16+1.6=5.4 +1.8=25X0.04=10-5.6=1.25 X 80=1.23+3=8-2.6=63 + 0.09=6.2 +0.2=7.8 +2.2=5.4 +0.9=0.44 X 2=0.25 X 40=0.2 X0.5=3.1 X0.5=0.83+0.2=2.02 9
19、=30.3+3=7.6 -0.7 6.8 +3.2=100-32.5=2.5 +25=0.9+0.99=400+0.1 =4.5 X3=3.1 X0.5=0.83+0.2=2.02 X 9=30.3+3=2.74+2=6 + 0.02=2.76 -0.36=0.06 X 0.9=5.8 +3.4=32 + 0.7=25X0.01 =4.1 X0.5=19.04 +2=0.74 -0.24=0.4 X2.5=0.16+0.3=3.18 X 100=41X0.4=0.86 +0.02=0.08+5=1.8 X30=800X0.4=1.2 +6=3.6 +40=3.2 +1.6=7-0.16=9.9 +3=5.2 X8=7.2 +40=4.3 0.01=0.06 X 0.8=6.52-5.12=3.6 +1.8=0.3=0.54X4=3.6 +6.4=12X0.5=36.05 +5=4.7 +1.9=