Multiply Divide Fractions Objective I can solve contextual

Multiply & Divide Fractions

Objective: I can solve contextual problems involving multiplying and dividing like and unlike fractions. (7. NS. A. 3)

What do you think we are learning today?

Vocabulary: -reciprocal: multiplicative inverse

What is reciprocal? Characteristics of reciprocal: -when dividing fractions, the second fraction is flipped and operation is changed to multiplication Examples:

WATCH THIS….

EXAMPLE 1: 3/5 X 1/5 =

EXAMPLE 2: ½÷¾ =

Your Turn. . TRY THESE…. 1) -2/3 X ½ = 2) 5/8 X -¼= 3) ¾ ÷ 1/8= 4) -7/9 ÷ -1/9 =

EXAMPLE 3: Liam wishes to make ½ of a recipe. If the recipe calls for ¾ cups of flour, how many cups should he use?

EXAMPLE 4: ¾ pounds of cashews will be divided into ¼ pound bags. How many bags can be made?

Your Turn. . TRY THESE…. 1) Mark left 3/8 of a pizza in the refrigerator. On Friday, he ate ½ of what was left of the pizza. What fraction of the entire pizza did he eat on Friday? 2) William has ¾ cups of fruit juice. If he divides the juice into 1/8 cup servings, how many servings will he have?

EXIT TICKET Evaluate the following. Show work. 1) Wyatt has 1/4 cups of fruit juice. If she divides the juice into 1/8 cup servings, how many servings will she have? 2) Lydia wishes to make 1/3 of a recipe. If the recipe calls for 2/3 cups of sugar, how many cups should she use?

NUMBER TALK

55 - 21