# Lesson: Multiply Fractions

6189 Views
17 Favorites

### Lesson Objective

SWBAT multiply fractions (mixed numbers and whole numbers)

### Lesson Plan

 Standard 6NSO.E18 – Estimate results of computation with whole numbers and with positive fractions, mixed numbers, decimals and percentages.  Determine reasonableness of estimates. Aim/Objective: Key Points ·         Multiply fractions ·         Procedural: S.O.S ·          when we multiply fractions – ·          shape the fractions, ·         operate by multiplying straight across the top and straight across the bottom and ·         simplify Assessment: x  =   A trail at Chinquapin Mountain is 3 miles long.  If Ronnie hikes the trail 8 times a month, how many miles will he hike?    A.      6 miles B.      11 miles C.      24 miles D.      25 miles    x  = Lesson Opening: ·         When we think of multiplying we generally think of groups of – today we are going start by seeing what multiplying fractions looks like and then moving into multiplying fractions (mixed numbers, improper numbers) without a model Intro: ·         Show an area model for the problem:3 x 4 as being the same thing as having three rows of 4 ·         Discuss that we can use the same model for fractions.  ·         First we draw the second fraction (model with example ¾ x 2/3). In this example we start by drawing 2/3. Next we will draw a picture of ¾ on top of the 2/3 – for this draw four rows and color in three of them. Last we will see where the fractions overlap and write a fraction based on our new picture. ·         Model through several more examples of drawing out the model for different multiplication of fraction problems ·         For each model have the second fraction already presented and students draw the first fraction on top of it. ·         Allow students to make predictions of the algorithm for multiplying fractions based on the models. ·         Explain to students the algorithm for multiplying fractions – S.O.S – Shape, Operate, Simplify ·         Shape – make the fraction look like a fraction in shape – with a single numerator and single denominator (change mixed numbers to improper fractions, change whole numbers to improper fractions) ·         Operate – multiply straight across the top and straight across the bottom ·         Simplify – simplify the fraction – change any improper fraction to a mixed number – write the number in its most simplest form.   Practice:  ·         Students practice multiplying fractions using algorithm on worksheet ·         Students practice applying fraction computation to word problems   Closing: ·         Review the steps for the algorithm ·         Discuss ways/situations/contexts for word problems that want us to multiply ·         Exit Ticket

### Lesson Resources

 CW Multiply Fractions and Mixed Numbers   Classwork 2,209 HW Unit 5 Multiply Fractions 1,555 U6 L5 Smooth Operator multiply fractions 1,760 U6.L5.Smooth.Operator.multiply.fractions.docx 813