4 2/5 + 5 6/9 + 2 3/4 + 3/5 + 1/3 + 1/4 =

1 bình luận về “4 2/5 + 5 6/9 + 2 3/4 + 3/5 + 1/3 + 1/4 =”

1. Giải đáp:

    4\frac{2}{5}+5\frac{6}{9}+2\frac{3}{4}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}

   =\frac{22}{5}+\frac{51}{9}+\frac{11}{4}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}

   =(\frac{22}{5}+\frac{3}{5})+(\frac{51}{9}+\frac{1}{3})+(\frac{11}{4}+\frac{1}{4})

   =\frac{25}{5}+(\frac{51}{9}+\frac{3}{9})+\frac{12}{4}

   =5+\frac{54}{9}+3

   =8+6

   =14

    ÁP DỤNG a\frac{b}{c}=\frac{axxc+b}{c}

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