Understanding Unknown Addends

What is the sum in the number sentence 7 + 5 = 12?

• 10

• 7

• 5

• 12

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

• Using a calculator

• Using a protractor

• Using fingers

• Using a ruler

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

• 1

• 2

• 4

• 3

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

• Drawing lines

• Drawing dots

• Drawing shapes

• Drawing numbers

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

• 8

• 7

• 6

• 5

What is the unknown addend in the equation 7 = what + 4?

• 5

• 3

• 4

• 2

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

• 5

• 7

• 6

• 8

What is the missing addend in the equation 6 + what = 10?

• 2

• 3

• 4

• 5

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

• Using fingers

• Using a number line

• Using counters

• Using a calculator

What is the total in the equation 6 + what = 10?

• 10

• 6

• 8

• 12