Properties of Addition
Addition Patterns
Vocabulary
Estimate by Rounding
Addition
100

Name the property

6 + 0 = 6

Identity Property of Addition

100

What is 1 more than 75?

76

100

What is another term for doing math in your head?

mental math

100

Estimate by rounding to the nearest 10. 

75 + 12

90

80 + 10 = 90

100

92 + 64

156

200

Name the property

8 + 7 = 7 + 8

Commutative Property of Addition

200

2,343; 3,343; 4,343; 5,343......

What is the pattern?

Adding (or plus/increase by) 1,000

200

What are the symbols that are used to group numbers in a number sentence?

parentheses

200

Round to the greatest place. 

634 + 788

1,400

600 + 800 = 1,400

200

387 + 251

638

300

Name the property

(7 + 6) + 5 = (6 + 5) + 7

Associative Property of Addition

300

495, 505, 515, ___, ___, 545 

Name the missing numbers.

What is the pattern?

525, 535

Adding (or plus/increase by) 10

300

What is a number close to its actual value?

an estimate

300

Estimate by rounding to the nearest hundred.

305 + 853

1,200

300 + 900 = 1,200

300

834 + 486

1,320

400

Which property states that you can change the order of the addends and still get the same sum?

Commutative Property of Addition

400

10 more than 723

100 more than 723

1,000 more than 723

733;   823;  1,723

400

What is the term of the missing number or what you are solving for in a problem?

the unknown

400

Estimate by rounding to the nearest ten. 

578 + 409

990

580 + 410 = 990

400

6,345 + 2,946

9,291

500

Which property states that the grouping of the addends does not change the sum?

Associative Property of Addition

500

1,000 more than 9,876

100 more than 9,876

10 more than 9,876

1 more than 9,876

10,876;   9,976;   9,886;   9,877

500

What is it called when you use place value to exchange equal amounts when renaming a number?

regrouping (to regroup)

500

Estimate by rounding to the nearest ten.

2,356 + 4,810

7,170

2,360 + 4,810 = 7,170

500

7,895 + 3,647

11,542