13 9/20 + 3 11/20

⚠ 13 9/20 is read as the mixed number 13 + 9/20■3 11/20 is read as the mixed number 3 + 11/20

Let's calculate:

13

+ \frac{9}{20}

+ 3

+ \frac{11}{20}

ⓘ Start from

13

and move forward

3

on the number line:

13 + 3

16

■To add fractions, put them over the same denominator, then add the numerators:

\frac{9}{20} + \frac{11}{20}

\frac{9 + 11}{20}

16 + \frac{9 + 11}{20}

ⓘ The numerator and the denominator are computed before the division:

9 + 11

20

16 + \frac{20}{20}

ⓘ We simplify the fraction by dividing the numerator and the denominator by

20

, their greatest common divisor:

\frac{20}{20}

1

16 + 1

ⓘ Start from

16

and move forward

1

on the number line:

16 + 1

17

▶Result:

17

100% free