Add and Subtracting 3 Digit Numbers

What is my first step when adding and subtracting?

• Go to the tens place

• Go to the ones place

• Go to the hundreds place

• Go to the thousands place

What kind of math can I do to check the answer to my subtraction problem?

• Division

• Addition 

• Multiplication

• Fractions

Find the answer: 123.07 + 74.9 = ____

• 197.97

• 872.07

• 130.56

• None of the above

The process of changing groups of ones to tens in adding and subtracting is called

• separating

• distributing

• regrouping

• dividing

401 - 86 = 

• 325

• 425

• 315

• 415

If you add 200 to 450, what is the sum?

• 650

• 660

• 670

• 680

The answer to an addition problem is called a

• product

• difference

• sum

• quotient

• 400 + 200 = 600
• 500 + 200 = 700
• 500 - 200 = 400
• 500 - 200 = 300

Round to the nearest hundred, then estimate the sum:

123 + 456

• 580

• 600

• 650

• 500

Round to the nearest hundred, then estimate the difference:

642 − 137

• 600

• 780

• 500

• 510