Multiplying Fractions

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Presentation transcript:

Multiplying Fractions Tape Diagram

Goal I will solve word problems using a tape diagram and fraction by fraction multiplication

Agenda Fluency Multiply Fractions Multiply whole numbers by decimals Whole class Problem set Exit ticket

Fluency: Multiply Fractions 1/3 of 2/5 2/3 of 2/5 3/5 of 2/3 3/5 x 3/4

Fluency: Multiply Whole Numbers by Decimals 3 x ______ = 3/10 7 x .1 = _______ 7 x .01= _______ 9 x .1= _______ 80 x .01 = _______ 15 x 1/10= _______

Anthony bought an 8 foot board Anthony bought an 8 foot board. He cut off ¾ of the board to build a shelf, and gave 1/3 of the rest to his brother for an art project. How many inches long was the piece Anthony gave to his brother?

Mrs. Jones made 60 cookies for a bake sale Mrs. Jones made 60 cookies for a bake sale. She sold 2/3 of them and gave ¾ of the remaining cookies to the students working at the sale. How many cookies does she have left?

___________________________60______________________________ Answer 3 units= 60 I unit= 60/3= 20 20/4= 5 ___________________________60______________________________ Sold Sold _________20_____ ¼ x 1/3 = 1/12 1/12 x 60 = 60/12= 5

Lukas spent 1/3 of his money on a burrito and a water Lukas spent 1/3 of his money on a burrito and a water. The burrito cost 2 times as much as the water. The burrito cost $4, how much money does Lukas have left?

Answer 2 units = 4 1 unit = 4/2 3 units= 6 2x6= 12 Burrito and Water B _______$4_____

Dean is sorting his rock collection Dean is sorting his rock collection. 2/3 of the rocks are metamorphic and ¾ of the remainder are igneous rocks. If the 3 rocks left over are sedimentary, how many rocks does Dean have?

Problem Set You will have ______ minutes to complete the problem set. You are to work alone. I will be calling students to the back table. If you are willing to help please move your number on the board Those that get stuck may ask one of these people for help.

Exit Ticket You will have three minutes to solve the exit ticket. Please draw a tape diagram and circle your final answer.

What did we learn?