3-Digit Subtraction

What do you call the answer to an addition equation

• the sum

• the difference

• the addend

What do you call the answer to a subtraction equation

• the sum

• the difference

• the subtraction

Which number is the SUM of the equation?

• 1

• 2

• 3

• 6

Which number is the DIFFERENCE of the equation?

• 7

• 3

• 4

• 10

What does ESTIMATE mean?

• to add or subtract

• to round the numbers and find about how much the answer is

• to guess the answer

Which equation correctly estimates the difference?

• 50 - 20 = 30

• 50 + 20 = 70

• 60 - 20 = 40

• 60 + 20 = 80

Which equation correctly estimates the difference?

• 60 - 20 = 40

• 70 - 30 = 40

• 60 + 30 = 90

• 70 + 30 = 100

Estimate the difference

• 20

• 30

• 70

• 80

Which equation correctly estimates the difference?

• 500 - 20 = 300

• 500 - 300 = 200

• 500 + 200 = 700

• 500 + 300 = 800

Which equation correctly estimates the difference?

• 200 - 100 = 100

• 190 - 47 = 143

• 200 - 0 = 200

• 200 + 100 = 300