数学口算题教学课件
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数学口算题教学课件
0.51000= 0.82+0.3=
13.5+6.5=
3.05100= 1.2-0.8=
21.6-12.6= 63100=
0.83-0.5=
0.350.2= 7.50.1= 2.52=
0.510= 0.68= 2.810=
0.70.8=
5.6+0.4= 4.7+2.3=
4.52= 7.20.8=
63.4=
0.62-0.32= 0.75100= 0.020.5=
3.60.3= 5.6100= 0.750.25=
0.1258=
0.862= 0.5628=
0.360.4= 0.79=
3.624=
0.81.1= 46.7-3.8= 12.84=
5.213= 1.64+4.1= 1020=
2415=
0.350.6= 4.7+2.3=
4.52= 6.9－2.5=
7.20.8=
63.4= 0.62－0.32= 1.40.5=
0.75100= 0.020.5= 3.60.3=
6.37=
5.6100= 0.750.25=
0.1258= 4.80.3=
0.962=
0.5628= 0.360.4= 0.640.8=
0.723.6= 3.612= 0.81.1=
7.2+12.8=
46.7－3.8= 12.84=
5.213= 12.55=
1.6441=
1020= 2415= 8.6510=
0.350.6= 3.080.01= 4.951000=
6.90.1=
0.40.5= 2.40.8=
10.89= 9.60.8=
1 8
0.1082= 4.950.9=
9.650.1= 0.325100=
2.58= 0.
560.7= 0.1254= 3.280.1=
3.90.13= 7.20.1= 0.010.1=
1.20.8=
0.070.7= 12.5=
1.250.8= 3.20.04=
01.7=
1.40.5= 1.550.5= 3.150.7=
1.860.2= 1.040.8=
1.160.4= 0.76+0.14=
0.72-0.43= 30100= 0.92-0.2=
3.5+4.8=
3.5+2.4= 5+0.07=
1-0.61= 0.47+0.23=
0.25+0.75=
3.7+0.33= 0.51+0.33= 1-0.6=
8-4.6= 5.8-3.6= 0.52+0.4=
6.45+5.5=
4.5-1.3= 3.4-2.8=
10+0.08= 9.5-7.3= 7.2+0.8=
7.82+0.3=
8.8-6.7= 9.5-7.3=
1-0.95= 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=
3.250= 0.450=
4.12= 4.254=
6.54= 2.30.06=
4.70.1= 540.8=
0.6100= 17.50.01=
12.50.8= 66.5=
0.380.1=
801000=
9.53-1.53=
12.58=
300.1=
0. 070.5=
150.08=
1.60.03=
3.20.5=
3.60.7=
1.360.2=
2.7+0.4=
8.8-6.7=
2.34=
2.63=
330.04=
0.090.9=
0.80.9=
250.4=
6.50.4=
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8.50.2= 0.660.3= 2.50.4=
7.70.8=
0.01220= 4.60.4=
30.09= 2.20.05=
4.10.6=
0.750.4= 230.4= 0.32100=
5.52= 4.7310= 023.5= 0.254=
7.20.5= 3.30.5= 600.8=
3.40.6=
0.1258= 4-1.4=
82-7.2= 19+9.1=
4.1-0.89=
5.68+0.42= 6.1-5.1= 0.72- 0.24=
0.8+0.18= 0.89-0.25= 1-0.98=
0.048+0.52=
5400= 19.9+11.1=
1871000= 1+3.89=
0.08110= 7510=
0.968= 0.87=
1.57= 1.328=
0.78= 10.32= 50.6=
0.90.3=
3.50.2= 2.010= 100.05=
0.137=
0.21100= 0.74= 0.054= 40.3=
430-250= 0.17+0.06= 1.02-0.09=
7200800=
0.17+0.6= 0.83-0.6=
17300= 0.98-0.09=
0.2+0.78=
6000.7= 10.2+0.02= 0.15+0.7=
670+250= 10.2+0.2= 9.2-6=
8500500=
3.2-3.2= 3.7+2.3=
25100= 3.2-0.32=
2+2.8=
380-290= 0.35+0.5= 0.35+0.63=
350070= 3.1+3= 3.8+0.38=
7500250=
3.8+1= 0.95-0.05=
450+780= 3.1+0.3=
3 8
3+0.3= 6309=
4.5-0.4= 9.5-5=
3309=
9.53-1.53= 9.5-0.5= 3.5+2.4=
1-0.95= 0.3+0.27= 0.47+0.13=
4.5+4=
4-0.6= 0.95+0.05=
2.5+3.2= 0.74+0.16=
23100=
9.8-4.8= 48040= 0.53100=
5.1+2.3=
7012=
0.05210=
0.270.9=
0.460.1=
1.920.4=
3.920.8=
0.980.7=
7.560.9=
1.180.2=
8.280.9=
2.480.8=
2.280.3=
1.328＝
3.50.2＝
0.137＝
0.450＝
12580=
0.25100=
10+0.08=
0.480.2=
0.220.2=
0.90.3=
4.320.9=
1.80.6=
1.190.7=
0.090.1=
30.5=
0.750.5=
0.250.4=
1.57＝
0.90.3＝
0.74＝
3.250＝
0.07810= 0.52+0.4=
3.4-2.8= 0.6-0.37=
1-0.75=
0.120.6=
8.730.9= 0.720.3=
3.450.5= 4.620.6=
5.110.7=
0.350.1=
0.240.8= 3.150.7=
1.760.4= 2.640.4=
1.530.9=
1.330.7=
0.210.1= 1.540.2=
1.710.3= 7.440.8=
1.920.8=
3.690.9=
1.60.8= 0.87＝
0.78＝ 10.32＝
50.6＝ 100.05＝
0.054＝ 12.58＝
2.34＝ 2.63＝
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7.50.1＝ 0.450.2＝ 4.12＝ 3.50.01＝
90.5＝ 09.8＝ 3.9＋0.39＝ 4.12＝
2.63＝ 1.258＝ 7.50.1＝ 10.06＝
0.90.3＝ 90.5= 2.50.4= 10－3.52=
8.2
＋1.8= 0.20.4= 0.224=
0.9－0.52=
3.991= 40.3=
300.1= 0.350.2= 1－
0.08=
4.8＋5.2= 2.010= 2.4 5=
1.25
8= 2.5412= 10-1.8-7.2= 7.82－7.2=
2.19＋9.1= 10.1－0.89= 6.8＋0.42=
0.8＋0.18=
0.72－0.24= 8.1－5.1=
0.89－0.25= 1－0.98=
0.48＋0.52=
0.540= 0.1258= 5.61.4＝
0.281.4＝ 0.10.5= 3.880.4=
0.21100=
3.4－1.4= 0.452.5＝
0.81.25＝ 0.33.6 ＝
0.30.3 ＝
100.07＝ 0.31.4＝ 0.057 ＝
0.920.4 ＝ 0.20.26＝ 0.144＝
0.020.1 ＝
1.20.3 ＝ 0.20.4＝
8.2＋1.8＝ 100-35.22 ＝
2.34 ＝
2.50.4＝ 2.45＝ 0.224 ＝
3.250 ＝ 0.9 － 0.52＝ 3.991＝
03.52＝
12.58＝ 810 =
1.470.7= 0.43+3.57=
0.90.8=
10.5= 0.963= 16.510=
0.56100= 3.78100= 40.8 =
3.215100=
5 8
0.810= 4.08100=
1.10.2 = 0.60.8 =
30.9=
2.50.4= 3.60.4= 12.58=
500.04= 800.3 = 1.19=
0.165 ﹦
1.78 ＋ 2.2 = 9.60.6 =
1.20.5-0.4 = 0.70.01 =
2.50.4 =
12 －3.9= 1.2581.25 = 6.60.66 =
5.370+4.63 = 3.9 ＋ 2.03＝ 4.23.5＝
1.6+2.40.3 =
2.14 － 0.9 ＝ 2.7 ＋7.3=
0.30.3= 7.2 ＋ 2.8 ＝
0.90.01＝
120.3= 2.870.7＝ 134 ＝
0.960.3 ＝
1.50.4＝ 70.25＝ 2.50.70.8=
8 －
2.5 ＝ 161.6＝ 5.61.01= 80.25 ＝
0.36 ＋ 0.64 ＝ 64.3216＝ 4.20.1＝
72.80.8 ＝
8.44.2 ＝ （ 1.5 ＋ 0.25 ）
4＝ 22.54= 13.8＋9.9
＝ 2.42.5＝
0.050.8＝ 2.56－0.37＝
1.250.80.5 ＝
122.5 ＝ 1.233＝
3.21.6= 3.5 ＋
3.53 ＝ 19.62 ＝ 8.82.2=
0.754＝ 0.50.8= 8.40.2=
1.60.2＝
7.20.3= 2.80.3=
0.90.15= 1.80.4=
5.50.55=
0.08100= 2.20.11= 5.46 ＋4.54=
12.50.8= 0.350.3= 1.45=
2.84=
19.64= 40.5=
7.51.5= 102.5=
3.521= 1.53=
2.26= 0.427=
0.420.6=
0.480.8= 0.90.45= 5.10.17=
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0.819=
4.80.16= 8.40.4= 1.85=
4.50.9= 2.9100= 1.50.03=
4.40.11=
9.616= 10.01=
4.25= 30.5=
6.1-0.5=
0.38+4.2= 03.89= 0.60.2=
6.44= 7.20.9= 4-0.18=
0.30.1=
0.12580= 42.5=
1.20.04= 0.7+6.53=
3.60.06=
1.250.25= 1-0.75= 2.61.3=
4.4+6.6= 7.4-0.54= 7.820.1=
0.51.6=
8.47= 15=
0.4+0.26= 2.56=
5.46=
0.0720= 0.455= 3.5-2.9=
0.480.24= 1.50.03= 5.65+0.35=
34=
0.32.9= 17.3-0.8=
2.50.5= 2.16-1.6=
30.44=
2.55= 603.2= 8.40.5=
87-8.7= 1.80.5= 4.50.15=
2.45=
3.60.02= 0.290.01=
1.5+0.9= 150.3=
0.060.9=
0.960.8= 2.411= 8.19=
60.3+0.67= 2.85= 0.720.6=
0.56=
0.0010.1= 187100=
0.9+0.28= 14=
4.030.5=
1.2+0.08= 7.20.09= 0.134=
0.30.2= 1.20.4= 0.611=
0.450.15=
0.25+0.5= 150.3=
102.5= 5.8-0.9=
7
8
3.42= 0.481.2=
4.3+6.9= 1.650.3=
12-1.1=
1.4+2.6= 12.44= 12.54=
9.50.5= 52= 9.1-1.9=
0.360.9=
05.4= 2.54.4=
3.063= 6.6-6=
7.64=
320.5= 0.25-0.19= 0.40.01=
20.32= 12.50.8=
600.2= 4.160.8=
3.38= 0.30.3＝
3.250＝ 0.057 ＝
0.144＝ 0.020.1 ＝
8.2＋1.8＝ 100-35.22
2.45＝
640.8=
5.4+6=
100.07＝
0.920.4 ＝
1.20.3 ＝
2.34 ＝
2.50.4
3.2-2.3=
0.65=
0.31.4＝
0.20.26＝
0.20.4＝
＝
＝