Question

1. Tính A) 5 + 4/7. B) 1 + 6/11. C) 7/19 + 3. D) 4/23 + 2.

Answer 1

Lời giải:

$5+\frac{4}{7}=\frac{5\times 7+4}{7}=\frac{39}{7}$

$1+\frac{6}{11}=\frac{11+6}{11}=\frac{17}{11}$

$\frac{7}{19}+3=\frac{7+19\times 3}{19}=\frac{64}{19}$

$\frac{4}{23}+2=\frac{4+23\times 2}{23}=\frac{50}{23}$