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用竖式计算3.45×0.36=

3.45*0.36=1.242270.6÷1.5=180.42.091÷1.02=2.050.2223÷0.65≈0.341.5÷0.045=33.3

3.45*0.36=1.242;91.2÷57=1.6;270.6÷1.5=180.4;2.091÷1.02=2.05;0.2223÷0.65≈0.34;1.5÷0.045=33. ? 3 ;

①3.45*0.36=1.242;②0.049*45≈2.2;③1.8÷12=0.15;④7.65÷0.85=9;⑤19.4÷12≈1.62;?⑥400÷75=5. ? 3 .

3.45*0.36=1.2421.2*5.65=6.78 109.2÷0.42=2602.091÷1.02=2.050.2223÷0.65≈0.34

3.45*0.36≈1.24;0.2223÷0.65≈0.34.

1.2*3.45=3.78; 3.15 * 1.2 . 630 315 3.780 91.8÷0.24=382.5; 382.5 24 9180 72 198 192 60 48 120 120 0 验算: 382.5 * 0.24 . 15300 7650 91.800 4.92÷2.3≈2.14; 2.139 23 49.2 46 32 23 90 69 210 207 3

3.45*0.12=0.414

16.78+3.45=(用竖式计算并验算)16.78+3.45=20.23 验算:

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