Chapter 4 Review (Decimals/ Order of Operations)

A

100

0.8 x 0.6

0.48

200

0.9 / 0.3 

3

300

6.4 x 1.2 - (15-10.2)

2.88

400

2/3 x (1/4)^2

1/24

500

(3^3+12)÷(4+2)+7

13.5

B

100

0.4 x 0.9

0.36

200

16.8 / 8.4

2

300

107.39 + (19-13.7) x 2.1

118.52

400

3[12−(8÷2)]+5^2

49

500

[30−(4^2+2)]÷3+7

11

C

100

7.14 x 6.2

44.26

200

113.2 / 3.7

30.59

300

12.5÷(2.5+2.5)×4

10

400

6^2−[4(3+2)−7]

23

500

4{6+[15÷(3×1)]}−10

34

D

100

13. 75 x 3.2

44

200

7.2 / 0.6

12

300

(18+12)÷(5−2)+4

14

400

(50÷2)−3^2+(8×2)

32

500

5^2−{3[10−(6+2)]}

19

E

100

28.981 x 0.34

9.85

200

9812.2 /159

61.71

300

What is the acrynom used to solve orders of operations? Provide an explanation of each letters. What is also important to remember with some of the operations?

Brackets 

Exponents

Division

Multiplication

Addition 

Subtraction

D/M and S/A have the same priority, move left to right

400

(9^2−30)÷(5+4)

5   2/3 

500

A class is buying supplies for an art project.

Each student needs:

• 4 sketchbooks at $6 each

• 3 packs of markers at $5 per pack

There are 7 students in the class.The store also gives the class a $20 discount on the total purchase.

What is the total cost after the discount is applied?

SOLVE: 7[(4×6)+(3×5)]−20

Therefore, the total cost after the discount is applied is $253.