Question

7/9-2/5=?
3/5+3/5=?
3 1/4-1 3/8=?

Answer 1

Resposta:

$\boxed{\dfrac{17}{45}}\\\\\boxed{1\dfrac{1}{5}}\\\\\boxed{1\dfrac{7}{8}}$

Explicação passo-a-passo:

$\dfrac{7}{9}-\dfrac{2}{5}=\dfrac{35-18}{45}=\boxed{\dfrac{17}{45}}\\\\\dfrac{3}{5}+\dfrac{3}{5} = \dfrac{3+3}{5}=\dfrac{6}{5}=\boxed{1\dfrac{1}{5}}\\\\3\dfrac{1}{4}-1\dfrac{3}{8} = \dfrac{13}{4}-\dfrac{11}{8}=\dfrac{26-11}{8}=\dfrac{15}{8}=\boxed{1\dfrac{7}{8}}$

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