Question

1. $\frac{1}{2}+\frac{2}{5}=\frac{square}{square}+\frac{square}{square}=\frac{square}{square}$

Explanation:

Step1: Find common denominator

The least common denominator of 2 and 5 is 10. Convert each fraction:
$\frac{1}{2} = \frac{1\times5}{2\times5} = \frac{5}{10}$, $\frac{2}{5} = \frac{2\times2}{5\times2} = \frac{4}{10}$

Step2: Add the converted fractions

$\frac{5}{10} + \frac{4}{10} = \frac{5+4}{10}$

Step3: Calculate the sum

$\frac{5+4}{10} = \frac{9}{10}$

Answer:

$\frac{5}{10} + \frac{4}{10} = \frac{9}{10}$ (The filled blanks are: $\boldsymbol{5}$ over $\boldsymbol{10}$, $\boldsymbol{4}$ over $\boldsymbol{10}$, $\boldsymbol{9}$ over $\boldsymbol{10}$)