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Properties of Mathematics
Order of Operations
Rounding Decimals
Adding and Subtracting Decimals
Multiplying and Dividing Decimals
100

(3+4)+2 = 3+(4+2)

The Associative Property of Addition

100

18 + 16 - 2 x 4

26

100

45.7324 to the Thousandths Place

45.732

100

4.55 + 3.21

7.76

100

45.5 x 3.7

168.35

200

18 x 1 = 18

The Identity Property of Multiplication

200

(5 + 13) x 4 - 10

62

200

.0475 to the Hundredths Place

.05

200

114.3 - 82.5

31.8

200

5.25 / 15

.35

300

(5 x 5) x 3 = 5 x (5 x 3)

The Associative Property of Multiplication

300

(4 x 5 + 3) - (5 x 3 )

8

300

43.87 to the Tenths Place

43.9

300

163.025 + 45.32

208.345

300

37.43 x 17

636.31

400

95 + 0 = 95

The Identity Property of Addition

400

20 / 4 x 9

45

400

874.4981 to the Tenths Place

874.5

400

45.2 - 3.136

42.064

400

107.9 / 8.3

13

500

7 x 9 x 3 = 9 x 3 x 7

The Commutative Property of Multiplication 

500

(6 x 4) - 2 x 8

8

500

45.7999 to the Thousandths Place

45.800

500

6098.5 - 487.4 + 54.87

5665.97

500

1080 / 1.5

720