Warm Up Problem Multiply: 1 3 4 x 2 4 5

Divide Fractions Lesson 4-7

Objectives I can divide two fractions. I can verify my answer using multiplication.

Example 1 Find 1 2 ÷ 1 3 . Write in simplest form. Flip flop the DIVISOR ONLY. The reciprocal of 1 3 is 3. Multiply. 1 2 x 3 = 1 2 x 3 1 = 3 2 Simplify. 3 2 = 1 1 2 Check: 3 2 x 1 3 = 3 6 → 1 2

Got It? 1 4 ÷ 3 8 2 3 ÷ 3 8 5 6 ÷ 1 3

Example 2 Write a story context for 2 3 ÷ 1 6 . Mariska has 2 3 pounds of sunflower seeds. Each day she feeds the cardinals in her yard 1 6 pound of seeds. For how many days will she be able to feed the cardinals?

Got It? 4) Write a story context for 3 4 ÷ 1 8 . Outline: (Name) has (first fraction) of ___________. Each day she/he give out (second fraction) of _________. For how many days will she/he (fill in based on your scenario)?

Example 3 Find 5 7 ÷10. 5 7 ÷ 10 1 = 5 7 x 1 10 = 1 7 x 1 2 = 1 14 Check: 1 14 x 10 = 10 14 → 5 7

Got It? 5) 8 9 ÷ 4 6) 4 5 ÷8 7) 12 13 ÷4

Example 4 Ramon is making party favors. He is dividing 3 4 pound of almonds into 12 packages. Write and solve an equation to find how many pounds of almonds are in each package. 3 4 ÷12 = 3 4 x 1 12 = 1 4 x 1 4 = 1 16 Check: 1 16 x 12 = 12 16 → 3 4

Got It? A neighborhood garden that is 2 3 of an acre is to be divided into 4 equal-size sections. Write and solve an equation to find the size of each section.

½ is being multiplied by 1/5. Homework Hints: #11. They are asking you to write in English words the equation in the Venn Diagram. Example: 1 2 ÷5 1 2 × 1 5 ½ is being multiplied by 1/5. It equals 1/10 ½ is being divided by 5.