Multiplicative Comparisons with Bar Models

This video tutorial teaches how to compare numbers using bar models and the phrase 'times as many'. It begins with an introduction to the concept, followed by examples involving characters like Jacob and Sally to illustrate 'twice as tall' and 'four times as tall'. The tutorial then demonstrates solving problems using bar models, such as 'three times as many as two' and 'four times as many as three', emphasizing visualization and practical application.

What is the primary purpose of using bar models in this lesson?

• To add numbers quickly

• To subtract numbers easily

• To compare numbers using multiplication

• To divide numbers accurately

If Jacob is twice as tall as Sally, how many Sallys would equal Jacob's height?

• Three Sallys

• Four Sallys

• Two Sallys

• One Sally

In the example with Sally and her dad, how many times taller is her dad compared to Sally?

• Four times

• Two times

• Three times

• Five times

How many groups of two are needed to represent 'three times as many as two' using bar models?

• Four groups

• Three groups

• Two groups

• One group

What is the result of 'three times as many as two' using bar models?

• Seven

• Four

• Six

• Five

When stacking bar models for 'three times as many as two', how many bars are stacked?

• One bar

• Two bars

• Three bars

• Four bars

In the problem 'four times as many as three', how many groups of three are used?

• Two groups

• Four groups

• One group

• Three groups

What is the total when you have 'four times as many as three' using bar models?

• Eighteen

• Fifteen

• Twelve

• Nine

How does the length of the bar model change when representing 'four times as many as three'?

• It triples

• It doubles

• It quadruples

• It stays the same

What concept is illustrated by comparing the height of Sally and her dad?

• Addition

• Subtraction

• Division

• Multiplicative comparison