Grade 4 - Progress in Mathematics

Update your skills. See page 4.

Addition Properties

2-1

4

5

1


 3

13

4

5

1


 3

13

3

0

7


 5

17

2

9

10

13

13

9

4

10

(4 
5) 
 2  4 
(5 
2)

9 
 2  4 
 7

11  11

The properties of addition can help you

to add quickly and correctly.

Commutative Property of Addition


Changing the orderof addends

does not change the sum.

5 
 6  11 5 6

6 
 5  11 
 6 
 5

11 11

Think

“order ”

Always do the computation

in parentheses first.

Change the order.

Change the order

and the grouping.

Associative Property of Addition


Changing the groupingof the

addends does not change the sum.

Use the properties to make adding easier.

Add down. Add up. (3 
7) 
 2 
 0 
 5  17

10 
 2 
 0 
 5  17

Think

Identity Property of Addition


The sum of zeroand a number

is the same as that number.

7 
 0  7 7 0

0 
 7  7 
 0 
 7

7 7

“same number”

Think

“grouping”

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