Understanding Unknown Addends

What is the unknown addend in the equation 7 + _ = 12?

• 7

• 9

• 5

• 3

Which strategy involves counting on from a known number to find the unknown addend?

• Using a calculator

• Using a number line

• Using a ruler

• Using a protractor

If you have 4 counters and need a total of 6, how many more counters do you need?

• 4

• 1

• 3

• 2

In the equation 9 = 2 + _, what is the unknown addend?

• 5

• 6

• 8

• 7

Which method can be used to find an unknown addend by drawing?

• Drawing a tree

• Drawing a house

• Drawing dots

• Drawing a number line

How many hops are needed to go from 2 to 9 on a number line?

• 5

• 6

• 7

• 8

What is the unknown addend in the equation 7 = 3 + _?

• 2

• 3

• 4

• 5

What is the unknown addend in the equation 6 + _ = 10?

• 2

• 3

• 4

• 5

Which of the following is NOT a strategy mentioned for finding unknown addends?

• Using a calculator

• Using counters

• Using a number line

• Using fingers

What should you do if you don't have counters to find an unknown addend?

• Use a protractor

• Use a pencil to draw

• Use a calculator

• Use a ruler