2.53×3.56+35点6×4点77-50-1点五六用第二次提取公因数该怎么算？
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2.53×3.56+35.6×4.77-50-1.56
=3.56×（2.53+47.7）-
=3.56×50.23-50.23+1.33
=50.23×（3.56-1）+1.33
=50.23×2.56+1.33
=50×2.56+0.2×5.56+0.03×2.56+1.33
=128+1.112+0.0768+1.33
=128+1.1888+1.33
=128+2.5188
=130.5188
=3.56×（2.53+47.7）-
=3.56×50.23-50.23+1.33
=50.23×（3.56-1）+1.33
=50.23×2.56+1.33
=50×2.56+0.2×5.56+0.03×2.56+1.33
=128+1.112+0.0768+1.33
=128+1.1888+1.33
=128+2.5188
=130.5188
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