Properties and Rules
Addition
Subtraction
Vocabulary
Estimate
100

34 + 27 = 27 + 34


What is the Commutative Property of Addition?

100

784 + 137 =

What is 921?

100

326 - 157 =

What is 169?

100

the answer to a subtraction problem

What is the difference?

100

Estimate to the nearest hundred.  

146 + 275 =

What is 400?

200

37 - 0 = 37

What is the rule -- a number minus 0 is that number?

200

907 + 243 =

What is 1,150?

200

500 - 213 =

What is 287?

200

The order in which numbers are added does not change the sum according to this property.

What is the Commutative Property of Addition?

200

Estimate to the nearest hundred.

517 + 267 =

What is 800?

300

(87 + 49) + 16 = 87 + (49 + 16)

What is the Associative Property of Addition?

300

5,816 + 184 =

What is 6,000?

300

2,501 - 1,427 =

What is 1,074?

300

The way in which numbers are grouped does not change the sum according to this property.

What is the Associative Property of Addition?

300

Estimate to the nearest thousand.

2,459 + 3,823 =

What is 6,000?

400

89 - 89 = 0

What is the subtraction rule -- a number minus itself equals 0.

400

14,824 + 5,676 =

What is 20,500?

400

4,000 - 2,461?

What is 1,539?

400

An _____________ is close to the exact answer.

What is an estimate?

400

Estimate to the nearest ten thousand.

12,751 + 6,127 =

What is 20,000?

500

54 + 0 = 54

What is the Identity Property of Addition?

500

276,485 + 341,952 =

What is 618,437?

500

12,849 - 4,962 =

What is 7,887?

500

To change the value of a number to one that is easier to work with is to ___________.

What is round?

500

Estimate to the nearest hundred thousand.

379,092 + 617,825 =

What is 1,000,000?