Multiplying Fractions and Bar Models

This lesson teaches how to multiply fractions by whole numbers using bar models. It begins with an introduction to the concept and explores the order of factors in multiplication. Two examples are provided: one with Kaelyn's oranges and another with Jennifer's roses, demonstrating how to use bar models to solve these problems. The lesson concludes with a summary of the key concepts learned.

What is the main concept introduced in this lesson?

• Multiplying fractions by whole numbers using bar models

• Subtracting fractions

• Adding fractions

• Dividing whole numbers

How can we think of multiplying six by one-third?

• As six groups of one-third

• As one group of six

• As six groups of six

• As one-third of one

What happens when you switch the order of factors in multiplication?

• The result changes

• The result doubles

• The result remains the same

• The result is always zero

How many oranges did Kaelyn give to her friend?

• Four

• Three

• Two

• One

What does the denominator in a fraction tell us when using bar models?

• The number of items to subtract

• The number of items in each group

• The number of groups to divide into

• The total number of items

How many roses did Jennifer put in the vase?

• Six

• Ten

• Eight

• Four

What fraction of Jennifer's roses were placed in the vase?

• Four-fifths

• Three-fifths

• Two-fifths

• One-fifth

How many roses are in each group when Jennifer divides them?

• Five

• Two

• Four

• Three

What is the multiplication equation for two-fifths of twenty?

• Two-fifths times ten

• Two-fifths times twenty

• Two-fifths times thirty

• Two-fifths times forty

What is the result of two-fifths times twenty?

• Ten

• Six

• Twelve

• Eight