Section 4.5 Part 1: Adding and Subtracting Fractions with Different Denominators

Convert 1/4 and 7/12 to equivalent fractions with denominator 12, their LCD.

1/4=?/12 7/12=?/12 1/4=3/12 7/12=7/12

Find the LCD for the fractions 32/15 and 11/21.

105

Find the LCD for the fractions 107/27 and 25/12.

108

Find the LCD for the fractions 59/20, and 65/24

120

Convert 35 and 19 to equivalent fractions with denominator 45, their LCD.

3/5= 27/45 1/9=5/45

Add or subtract: 1/4−(−1/8).Enter your answer as a reduced fraction.

3/8

Add or subtract: y/2+2/3.Enter your answer as a reduced fraction.

3y+4/6

Use either the multiples method or the prime factors method to find the least common multiple of 14 and 6.

42

Add or subtract: x/3+1/4.Enter your answer as a reduced fraction.

4x+3/12

Find the least common denominator for the fractions: 7/12 and 11/15.

60

Find the LCD for the fractions 17/36 and 17/8.

72

Find the least common denominator for the fractions: 13/24 and 17/32.

96

Use either the multiples method or the prime factors method to find the least common multiple of 9 and 33.

99