0.56×2.74+2.74×0.44过城

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0.56×2.74+2.74×0.44过城0.56×2.74+2.74×0.44过城0.56×2.74+2.74×0.44过城=2.74x(0.56+0.44

0.56×2.74+2.74×0.44过城
0.56×2.74+2.74×0.44过城

0.56×2.74+2.74×0.44过城
=2.74x(0.56+0.44