Question

4/5 + 9/10 what is this answer?

Answer 1

4/5=0.8 9/10= .9
0.8+.9=1.7

Answer 2

$\boldsymbol{\sf{\dfrac{4}{5}+\dfrac{9}{10} } }$

The least common multiple of 5 and 10 is 10. Convert 4/5 and 9/10 to fractions with denominators of 10.

$\boldsymbol{\sf{\dfrac{4\times2}{5\times2}+\dfrac{9}{10} \ \ \to \ \ Simplify }}$

$\boldsymbol{\sf{ \dfrac{8}{10}+\dfrac{9}{10} }}$

Since 8/10 and 9/10 have the same denominator, join their numerators to add them.

$\boldsymbol{ \sf{\dfrac{8+9}{10} \ \to \ \ Add }}$

Simplify

$\boldsymbol{\sf{ \dfrac{17}{10}= }}\boxed{\boldsymbol{\sf{1\frac{7}{10} }}}$