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1、1 口算练习题一 4.95 0.9= 9.650.1= 0.325100= 2.58= 2 1 2 1 = 3 2 4 3 = 12 3 2 = 4 1 3= 0.63 5 4.433 5 1 6 1 6 4 5 5 8 3.613 5 2 3 5 2 7 4 3 2 1.50.05 .50.4 8 3 3= 36 2 1 = 2 1 5 2 = 18700= 40080 644 36020 1 7 5 = 9 8 4= 31.95= 8 7 4 3 = 1.64 41= 1020= 2415= 8.6510= 45 10 9 91 5 4 5 4 3 3 1 3 3 1 100.9 9.5+
2、5= 4 3 1 71.4 3 11 7 = 4 8 3 = 6 1 15 9 2 21 2 1 7 8 7 3 11 6 1 2412 3 2 15 10 7 5.895.8 4 1 3 1 = 2 1 5 1 = 4 1 8 1 = 4 1 6 1 = 8 3 8 5 8 5 8 3 正确率： 2 口算练习题二 8 5 8 4 = 5 9 3 2 = 11 8 8= 4 1 3 1 = 0.56 0.7= 0.1254= 3.280.1= 3.90.13= 3 2 2 3 = 3 1 27= 26 2 1 = 7 6 2= 3 2 3 2 = 4 1 3 1 = 13 2 2= 26 5
3、13= 5 4 3= 5 4 10 7 = 4 1 8= 4 1 3= 7.2+12.8= 46.73.8= 12.84= 5.213= 3.613 5 2 3 5 2 7 4 3 2 1.50.05 5 3 2 1 = 7 1 2 1 = 24 3 2 = 8 3 5 4 = 12 1 2 = 17 7 6 7 12 7 4 = 11 3 1 4 3 5 7 = 7 3 6 5 = 8 7 2 8 1 = 25 5 2 4= 21 3 15 7 = 6 1 4 3 = 9 8 6 5 = 12 5 5 6 = 8 5 35 2 = 30 12 16 5 = 5 7 7 10 = 3 5 4
4、= 2 11 4 = 8 4 1 = 14 1 20 7 = 6 1 24 3 = 8 12 5 = 25 5 15= 16 1 24 4 = 22 3 12 11 = 正确率： 3 口算练习题三 2.50.4 8 3 3= 36 2 1 = 2 1 5 2 = 0.35 0.6= 3.080.01= 4.951000= 56= 6 5 5= 9 5 18= 7 6 5 6 = 5 3 2 1 = 7 1 2 1 = 24 3 2 = 8 3 5 4 = 18700= 40080 644 36020 4 15 1 4 = 4 3 4 3 = 7 1 10 3 = 1.8 6 1 = 0.35
5、0.6= 3.080.01= 4.951000= 6.90.1= 45 14 21 15 = 2 1 2 1 = 4 4 3 = 12 3 2 = 46.7 3.8= 12.84= 5.213= 12.55= 0.25 3.974= （1.2 8.8 ）0.4= 4020%= 36 1 14 9 27 18 5 28 2 6 4 10 7 6 2 18 3 380-290= 10.2+0.02= 0.15+0.7= 670+250= 10.2+0.2= 25100= 3.2-0.32= 2+2.8= 18.35.9= 正确率： 4 口算练习题四 0.21 100= 0.74= 0.054= 4
6、0.3= 1 7 5 = 9 8 4= 31.95= 8 7 4 3 = 5400= 5 3 2 1 = 7 1 2 1 = 24 3 2 = 10 7 7 5 = 3 2 3 2 = 7 6 6= 4 3 8= 0.56 28= 0.360.4= 0.40.5= 6 7 1 = 22 3 11= 10 7 5 = 7 6 3 2 = 5 11 2 = 5 5 12 = 5 144 12= 3.75= 3000.3%= 430-250= 0.17+0.06= 1.02-0.09= 7200800= 010%= 6.880%= 5 4 （ 5 4 2 1 ）4020%= 254= 0.1258=
7、 4.80.3= 0.962= 3 1 4 5 = 25.0 4 3 = 3 2 3= 12 6 5 = 8 1 83= 20 3 20 3 = 5 2 1= 5 3 9 1 = 5 9 9 13 = 8 7 2 8 1 = 45 10 9 94.8 0.3= 2 1 2 1 = 4 4 3 = 2 3 5 2 7 4 3 2 2.50.4 = 1.50.05 1 5 4 5 4 3 3 1 3 3 1 25 5 2 49.5-9.5 0= 正确率： 5 口算练习题五 22 3 11= 10 7 5 = 7 6 3 2 = 5 11 2 = 1010%= 6.880%= 6 1 4 = 12
8、3 5 = 18 5 1= 12 4 3 = 1 3 5 = 7 2 3 2 = 4.7+2.3= 6.92.5= 7.20.8= 63.4= 4 15 1 4 = 4 3 4 3 = 7 1 10 3 = 1.8 6 1 = 2 5 2= 3 4 6 = 6 7 17 = 3 11 22 9 = 0.620.32= 1.40.5= 0.75100= 0.68+0.42= 28 3 14 = 0 6 1 = 3 2 2 1 = 5 4 2 1 = 12.5= 1.250.8= 3.20.04= 01.7= 0 7 12 1 8 = 1 2 4 5 0.6= 3 1 6 1 0.245 正确率：
9、 6 口算练习题六 4 21 7 4 = 2 1 2= 7 5 3 2 = 2 1 3 2 = 8 4 7 2.75 1 2 3.2 10 9 = 2 1 5 1 = 5 5 12 = 5 144 12= 3.75= 3000.3%= 284 5 = 12 5 4 15 = 1 5 4 4 3 9 8 0.3 5 6 = 3 5 9 10 = 3 8 4 7 = 320.4 0.02 0.5= 3.60.3= 6.37= 5.6100= 5 3 3 2 = 4 5 5 12 = 0 6 5 = 5 4 3 = 1.5 7= 1.328= 0.78= 10.32= 430-250= 0.17+0
10、.06= 1.02-0.09= 7200800= 2.4 0.8= 10.89= 9.60.8= 0.1082= 4 7 1 8 = 5 6 03 5 = 1 7 8 = 3 4 16= 2 1 4 1 - 8 1 = 2 1 4 1 8 1 = 5 4 （ 5 4 2 1 ） = 正确率： 7 口算练习题七 4 7 1 8 = 5 6 03 5 = 1 7 8 = 3 4 16= 0.081 10= 7510= 0.960.8= 0.87= 6 5 8 7 = 245= 9 8 9 8 = 0.3 3 5 = 50.6= 0.90.3= 3.50.2= 2.010= 10 7 7 5 = 3
11、 2 3 2 = 7 6 6= 4 3 8= 9.2-6= 8500500= 3.2-3.2= 3.7+2.3= 6 7 2 = 0 6 5 = 6.30.07= 26 13 12 = 7.2 0.1= 0.010.1= 0.250.4= 1.60.8= 5400= 5 3 2 1 = 7 1 2 1 = 24 3 2 = 2 1 4 1 - 8 1 = 2 1 4 1 8 1 = 5 4 +（ 5 4 2 1 ）= 正确率： 8 口算练习题八 17300= 0.98-0.09= 0.2+0.78= 600700= 5 3 2 1 = 7 1 2 1 = 24 3 2 = 8 3 5 4 = 0.56 28= 0.360.4= 0.40.5= 6 7 1 = 8 5 8 4 = 5 9 3 2 = 11 8 8= 4 1 3 1 = 0.47+0.13= 4.5+4= 4-0.6= 0.95+0.05= 1 7 5 = 9 8 4= 31.95= 8 7 4 3 = 1 4 99 1 4 = 5 6 1 3 = 254= 0.1258= 5 7 2 3 5 7 = 1 2 1 3 1 2 1 3 = 1 7
