Topic 2 Vocabulary

Addends can be regrouped and the sum remains the same

• associative property of addition

• commutative property of addition

• compatible numbers

• compensation

The orders of addends can be changed and the sum remains the same.

• associative property of addition

• commutative property of addition

• compatible numbers

• compensation

Numbers that are easy to compute mentally.

• associative property of addition

• commutative property of addition

• compatible numbers

• compensation

Adjusting a number to make computation easier and balancing by changing another number.

• associative property of addition

• commutative property of addition

• compatible numbers

• compensation

True or False:

The following problem is an example of the associative property.

(5+4)+7 = 5+(4+7)

• True

• False

True or False:

The following problem is an example of the associative property.

2+(2+3) = (2+2)-3

• True

• False

True or False:

The following problem is an example of the commutative property.

9+2+4 = 10+2+3

• True

• False

True or False:

The following problem is an example of the commutative property.

1+6+9 = 1+9+6

• True

• False

True or False:

The following problem is an example of the compatible numbers.

50+10

• True

• False

True or False:

The following problem is an example of the compensation.

9+7 = 10+6

• True

• False