Unit 2 pt1 Money, Addition Properties and Mental Math

Front

What is the Identity Property of Addition?

Back

The Identity Property of Addition states that when you add 0 to any number, the result is that number. For example, 5 + 0 = 5.

Front

What is the Commutative Property of Addition?

Back

The Commutative Property of Addition states that you can add numbers in any order. For example, 3 + 4 = 4 + 3.

Front

What is the Associative Property of Addition?

Back

The Associative Property of Addition states that when adding three or more numbers, the way in which the numbers are grouped does not change the sum. For example, (2 + 3) + 4 = 2 + (3 + 4).

Front

Calculate: 45 + 24 = ?

Back

69

Front

Calculate: 96 - 45 = ?

Back

51

Front

What is mental math?

Back

Mental math is the ability to perform calculations in your head without using a calculator or paper.

Front

What is the result of adding 0 to 213?

Back

213 (This demonstrates the Identity Property of Addition.)

Front

If you have 75 + 24, what is the same expression using the Commutative Property?

Back

24 + 75

Front

What is 88 - 19?

Back

69

Front

What is the result of 50 + 25 + 25?

Back

100 (This demonstrates the Associative Property of Addition.)