Question

Q.Find the difference:

1. 13/14 - 20/21​

Answer 1

$\huge \rm{resposta: \: } \boxed{ - \frac{1}{42} }$

$\huge\blue{\boxed{\pink{\boxed{ \blue{ \rm{conta ~ armada }}}}}}$

$\huge \frac{13}{14} - \frac{20}{21} \\ \\ \huge \frac{13 \times 3}{14 \times 3} - \frac{20 \times 2}{21 \times 2} \\ \\ \huge\frac{39}{42} - \frac{40}{42} \\ \\ \huge\frac{39 - 40}{42} \\ \\ \huge \frac{ - 1}{42} \\ \huge \boxed{ - \frac{1}{42} }$

espero ter ajudado

$\huge \sf{by: \red{ \: maya}}$