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2.15*6.8竖式

3.8×0.15=0.574.6×50=2308.7×2.04=17.7483.2×9.8=129.360.86×0.72=0.61922.7+9.41=12.117.5-1.83=5.675-1.08=3.92

23.5×7.6=178.6; 15.75÷2.1=75; 8÷0.9≈8.89.

(1)7.8×0.2=15.6,改正:(2)0.039×0.8=0.312,改正:(3)6.3×8.2=516.6,改正:;(4)13.5×3.8=5.13.改正:

(1)68.8÷4= (2)85.44÷16= (3)67.5÷15= (4)289.9÷18= (5)101.7÷9= (6)243.2÷64= (7)16.8÷28= (8)15.6÷24= (9)0.138÷15= (10)1.35÷27= (11)0.416÷32= (12)3.64÷52= (13)91.2÷3.8= (14)0.756÷0.18= (15...

(1)20.88÷2.4≈10,(2)0.15÷0.6≈0.3(3)7.68÷0.8≈7,(4)3.36÷2.8≈1,(5)1.107÷0.09≈11,(6)0.832÷0.16≈4;(1)20.88÷2.4=8.7,(2)0.15÷0.6=0.25,(3)7.68÷0.8=9.6,(4)3.36÷2.8=1.2,(5)1.107÷0.09=12.3,(6)0.832÷0.16=5.2.

(1)20.88÷2.4≈10,(2)0.15÷0.6≈0.3(3)7.68÷0.8≈7,(4)3.36÷2.8≈1,(5)1.107÷0.09≈11,(6)0.832÷0.16≈4;(1)20.88÷2.4=8.7, (2)0.15÷0.6=0.25, (3)7.68÷0.8=9.6, (4)3.36÷2.8=1.2, (5)1.107÷0.09=12.3, (6)0.832÷0...

6.2+14.98=21.18;2.57+5.8=8.37;62.84+39.7=102.54;5.1-1.23=3.87;20-3.65=16.35;16.05-9.7=6.35;3.8×0.15=0.57;0.32×7.9=2.528;1.24×8.5=10.54;

1+1+1+1+11+1+1+1+1+1=20

如 (1)68.8÷4= (2)85.44÷16= (3)67.5÷15= (4)289.9÷18= (5)101.7÷9= (6)243.2÷64= (7)16.8÷28= (8)15.6÷24= (9)0.138÷15= (10)1.35÷27= (11)0.416÷32= (12)3.64÷52= (13)91.2÷3.8= (14)0.756÷0.18= (...

40.32÷24 7.8÷6 5.81÷5 111÷0.3 4.80÷12 117÷36 1.8÷12 67.2÷4 1.35÷27 11.5÷5

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