Multiplication Concepts and Bar Models

Miss Velli introduces the concept of comparing numbers using bar models and the phrase 'times as many'. The lesson includes examples with Jacob and Sally to illustrate the concept, followed by demonstrations of bar models in both horizontal and vertical formats. Students are guided through practice problems to reinforce their understanding.

What is the main topic of this lesson?

• Division using bar models

• Subtraction using bar models

• Addition using bar models

• Comparing numbers using bar models

What is a bar model used for?

• To represent multiplication sentences

• To represent subtraction problems

• To represent division problems

• To represent addition problems

What is the guiding question of the lesson?

• How can you use bar models to add numbers?

• How can you use bar models to subtract numbers?

• How can you use bar models and 'times as many' to compare numbers?

• How can you use bar models to divide numbers?

If Jacob is twice as tall as Sally, how many Sallys would you picture?

• One Sally

• Two Sallys

• Four Sallys

• Three Sallys

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

• Three groups

• Two groups

• Four groups

• One group

What is the product of three times as many as two?

• Five

• Seven

• Four

• Six

How many groups of three are needed to represent 'four times as many as three'?

• One group

• Two groups

• Three groups

• Four groups

What is the product of four times as many as three?

• Nine

• Ten

• Eleven

• Twelve

What is the phrase for the multiplication problem 2 * 3?

• Two times as many as four equals eight

• Three times as many as two equals six

• Four times as many as two equals eight

• Two times as many as three equals six

What is the phrase for the multiplication problem 6 * 7?

• Six times as many as seven equals forty-two

• Seven times as many as six equals forty-two

• Six times as many as eight equals forty-eight

• Eight times as many as six equals forty-eight