Lesson 15. Adding fractions

You can add two or more simple fraction as long as the denominators are the same.

EXAMPLE:

Add the numerators (top numbers).

Denominator (bottom number) stays same.

EXAMPLE:

The denominator must be the same before adding.

EXAMPLE:

Calculate

The lowest common multiple of 3 and 8 is 24.

Multiply ¹/₃ top and bottom by 8 to express in 24ths.

Multiply ³/₈ top and bottom by 3 to express in 24ths.

Add the numerators.

Adding Fractionand Mixed Numbers.

To add fractions or mixed number when the denominators are different, rename the fractions so the denominators are the same.

EXSAMPLS:

Tasks to the lesson 15

Other lessons:

Уроки математики и физики для школьников и родителей