8th Pre-Alg Unit 2 Test Review Part 2

Prime Factoring LCM

100

Find the Least Common Multiple of 45 and 75

225

200

Find the Least Common Multiple of 44 and 66

132

300

Find the Least Common Multiple of 14, 28, and 56

56

400

Find the LCM of 12 and 28 to solve the problem:
7/12ths + 5/28ths =

64/84ths reduced = 16/21sts

500

Find the LCM of 15 and 48 to solve the problem:
14/15ths - 11/48ths

169/240ths

Profit or Loss

100

Income: $560
Expenses: $235.75

Profit = $324.25

200

Income: $1,550
Expenses: $1,639

Loss = $89

300

Income: $450
Expenses: $204

Profit = $246

400

Income: $2,375
Expenses: $2,726

Loss = $351

500

Income: $900
Expenses: $928.25

Loss = $28.25

Percent of Increase or Decrease

100

A change from 30 to 25

17% decrease

200

A change from 15 to 8

47% decrease

300

A change from 2.49 to 2.99

20% increase

400

A change from 18 to 78

333% increase

500

A change from 40 to 110

175% increase

Proportions to Solve % Word Problems

100

Jane's bill was $20. She paid $13.35 with cash and charged the rest to her credit card.  What percent of the total did she pay with cash? Round to the nearest tenth percent. 

67.8% paid with cash

200

Jane's bill was $20. She paid $13.35 with cash and charged the rest to her credit card.  What percent of the total did she pay with the credit card?  Round to the nearest tenth of a percent.

32.2% paid with card

300

Mom bought 50 flowers.  35 of the flowers are red. What percent of the flowers are red?  Write as a whole percent. 

70% are red

400

The store sent out 46 coupons to the neighborhood.  Only 28 of them were redeemed.  What percent of the coupons were redeemed? Round to the nearest whole percent.

61%

500

While at work, the man spends 5 hours of his 40 hour work week looking at emails.  What percent of his time is spent on emails?  Round to the nearest whole.

13%

Simplifying Expressions

100

Simplify:
2c - 8c - 3d + 4 +7d + 14

-6c + 10d +18

200

x + 2x - 8y - 3x +7x + 4y -3y

7x - 7y

300

14 + 10d + 6 + 6d - 2

16d + 18

400

2x + 3y - 4y +3x + 6x

11x - y

500

6a - b + 7a - 5

13a - b - 5