Answer:

Explanation:
Verify each expression
case 1) we have

Multiply the first term by 10/10

Remember that
Fractions with the same denominator, you can add the numerators and write the sum over the common denominator
so

therefore

case 2) we have

Multiply the second term by 10/10

Remember that
Fractions with the same denominator, you can add the numerators and write the sum over the common denominator
so

therefore

case 3) we have

Multiply the second term by 10/10

Remember that
Fractions with the same denominator, you can add the numerators and write the sum over the common denominator
so

therefore

case 4) we have

Multiply the first term by 10/10

Remember that
Fractions with the same denominator, you can add the numerators and write the sum over the common denominator
so

so

This expression is the answer