Topic 3 - End of Topic

Which two equations can be added together to make 6x7?

• (3x7) + (4x7)

• (6x7) + (6x1)

• (4x7) + (2x7)

• (4x4) + (2x3)

Answer explanation

4 groups of 7 and 2 groups of 7 makes:

6 groups of 7!

Does this use commutative property of multiplication?

1. 4 x 8 = 4 x (4+4)

• Yes

• No

Answer explanation

When you "commute" you "move around" the factors.

Tags

properties

3.oa.5

Does this use commutative property of multiplication?

1. 4 x 6 = 6 x 4

• Yes

• No

Answer explanation

When you "commute" you "move around" the factors.

Tags

properties

3.oa.5

Does this use commutative property of multiplication?

1. (2 x 3) x 4 = 2 x (3 x 4)

• Yes

• No

Answer explanation

When you "commute" you "move around" the factors.

Associative property just moves the parentheses.

Tags

properties

3.oa.5

Does this use commutative property of multiplication?

1. (2 x 3) x 4 = 4 x (2 x 3)

• Yes

• No

Answer explanation

When you "commute" you "move around" the factors.

Tags

properties

3.oa.5

Lucky says that any x8 fact can be broken into two 4s facts that can be added together.

Write an equation to prove that this is true.

Answer explanation

4 groups + 4 groups is 8groups.

Jamal broke up a large array into a 3 x 6 array and a 4 x 6 array.

Add the small arrays together to find the large array!

• 6x6

• 7x6

• 3x6

• 7x10

Answer explanation

3 rows of 6 +

4 rows of 6 is

7 rows of 6

Which facts can be added together to get 6x8?

Pick 3 correct answers

A bookstore uses 6 books in each bookshelf.

There are 2 bookshelves on each of the store's 4 walls.

How many books are there total on the bookshelves?

Draw a picture, and then find the equation that matches.

• 6x2x4=24

• 6+2+4=12

• 6x4x2=48

• 6+2+4=16

What number could complete this equation?

(3x8) + (4x8) = ​ (a)  

• 56
• 38
• 48
• 78
• 15