Doubling Known Facts

​Julie is doubling a known fact to figure out what 8 x 10 is.

Multiple Choice

Julie is doubling a known fact to figure out what 8 x 10 is. Choose the known fact that she could double to find the product of 8 x 10.

• 8 x 5

• 5 x 10

• 10 x 8

• 5 + 8

• 5 x 10

On this side are 3 rows of 4 happy faces. On the other side are twice as many.

How can I use this information to find out how many are in the next picture?

Multiple Choice

Donald wants to double his 2 baskets of 7 apples.

How many apples will he have?

• 14 apples

• 28 apples

• 21 apples

• 7 apples

Multiple Choice

Donald wants to double his 2 baskets of 7 apples.

Which expression can he use to find out how many apples he will have?

• (1 x 7) + (1 x 7)

• (2 x 7) + (2 x 7)

• (2 x 7) + (1 x 7)

• 14 - 7

​What are some ways to express the total number of red dots?

Multiple Choice

Which expression can be used to find the product of 4 x 5?

• (4 x 5) + (5 x 5)

• (2 x 5) + (2 x 5)

• (2 x 5) x (2 x 5)

​What are some ways to express the total number of dots?

Multiple Choice

Which expression can be used to find the product of 8 x 6?

• (4 x 6) + (4 x 6)

• (4 + 6) x (4 + 6)

• (8 x 6) + (8 x 6)

​ groups of 8 dots

​4 groups of 8 dots

​

​ groups of 8 dots

​

Multiple Choice

Hector wants to double a known fact to help him find out how many circles are in this array. Which known fact can he double for this array?

• 8 + 8

• 2 x 8

• 4 + 8

• 2 + 8

Multiple Choice

Chris placed 6 rows of 3 squares together. What will he get if he doubles the squares?

• 12 squares

• 15 squares

• 18 squares

• 36 squares

Multiple Choice

Which expression can be used to find the product of 6 x 8?

• (6 x 8) + (6 x 8)

• (3 + 8) + (3 + 8)

• (3 x 8) + (3 x 8)

Multiple Choice

Lucy has 4 photo albums. Each album has 12 photos. What expression can she use to find out how many photos she has altogether?

• (4 x 6) x (4 x 6)

• (4 x 12) + (4 x 12)

• (4 x 6) + (4 x 6)

Multiple Choice

Choose the equation that is FALSE.

• 8 x 3 = (4 x 3) + (4 x 3)

• 7 x 6 = (7 x 3) + (7 x 3)

• 8 x 2 = (8 x 4) + (8 x 4)

Multiple Choice

Which number completes this equation: 72 = ( ___ x 9) + (4 x 9)

• 8

• 4

• 9

• 6