Addition Of Fraction

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LOUIE V. LORAÑABSED MATH 4 : 

LOUIE V. LORAÑABSED MATH 4 PRESENTS: ADDITION of FRACTIONS

OBJECTIVE: To be able to add fractions. : 

OBJECTIVE: To be able to add fractions.

Complete the magic square. The sum of rows, columns and diagonals should be the same. : 

Complete the magic square. The sum of rows, columns and diagonals should be the same. 5 3 1 7 12 1 3 4

Slide 4: 

In adding similar fractions, add the numerators and copy the common denominators.

Example 1. : 

Example 1. 5 7 14 5 9 9 9 9 9 Or 1 + +

Example 2. : 

Example 2. 3 4 5 12 5 7 7 7 7 7 Or 1 + +

Slide 7: 

In adding dissimilar fractions, rename the dissimilar fractions as similar fractions using the LCD. Add the numerators. Use the LCD as the denominator. If possible express the answer in simplest form.

Example 1. : 

Example 1. Add and 12 3 4 ( Rename and to similar fractions) 1 2 3 4 3 2 3 2 4 4 4 5 4 1 4 Or 1 + + = =

Example 2. : 

Example 2. Add and 35 1 3 ( Rename and to similar fractions) 3 5 1 3 3 1 9 5 5 3 15 15 14 15 + + = =

Slide 10: 

In adding whole numbers and mixed forms, write the addends in the proper column. Express the dissimilar fractions as similar fractions. Start with adding the fractions then the whole numbers. Express the answer in lowest terms. Express the dissimilar fractions as similar fractions.

Example 1. : 

Example 1. 1 4 4 3 2 + 4 1 4 + 6 4 4 7 4 or 5 3 4

Example 2. : 

Example 2. 4 3 1 2 + 8 6 + 3 6 5 11 6 or 6 5 6 5 5