Decimals and Percents
Area and Perimeter
Parentheses to Make True Number Sentences
Discount Sales Problems
Multiply and Divide Decimals
100
Using your calculator, what is 7/19 as a decimal rounded to the nearest thousandth?
7/19 = 0.368
100
What is the perimeter and area of the rectangle below?
Perimeter = 7 + 7 + 12 + 12 = 38 cm
Area = 7 x 12 = 84 cm2
100
Add parentheses to make the number sentence true.
50 + 40 x 6 = 540
(50 + 40) x 6 = 540
100
Ballet flats at Nordstrom's are normally $65. Nordstrom's is having a 40% off summer sale on all products. How much money will you save on the ballet shoes with the sale?
$26 savings
100
Write a number model to estimate the product. Then determine where the decimal should go in 2494
58 x 4.3 = 2494
Number Model = 60 x 4 = 240
Decimal placement = 249.4
200
Using your calculator, what is 6/29 as a percent? (Don't include a decimal in your percent)
6/29 = 21%
200
What is the perimeter and area of the parallelogram below?
Perimeter = 7 + 7 + 8 + 8 = 29 cm
Area = 8 x 4 = 32 cm2
200
Add parentheses to make the number sentence true.
14 = 53 - 18 + 21
14 = 53 - (18 + 21)
200
Ballet flats at Nordstrom's are normally $65. Nordstrom's is having a 40% off summer sale on all products. How much will the new price be after the discount has been applied?
Discounted price = $39
65 x 0.4 or 65 x 4/10 = $26
65 - 26 = $39
200
Write a number model to estimate the quotient. Then determine where the decimal should go in 795
63.6 / 8 = 795
Number Model = 64 / 8 = 8
Decimal placement = 7.95
300
Ronald made 14 out of 20 shots in the basketball game. What percent of his shots did he make?
At this rate, how many shots would he make if he shot the ball 50 times in his next game?
70%
35 shots made for 50 attempts
300
What is the perimeter of the irregular shape below?
Perimeter = 3 + 3 + 3 + 2 + 9 + 2 + 3 + 3 = 28 inches
300
Add parentheses to make the number sentence true.
50 - 15 / 5 = 7
(50 - 15) / 5 = 7
300
Basketballs at Sports Chalet are normally $50 but the store is having a 25% off sale. What is the new price with the sales discount?
Discounted sales price = $37.50
$50 x 0.25 or $50 x 1/4 = $12.50
$50 - $12.50 = $37.50
300
Use paper and pencil to multiply. (estimate your answer first)
8.7 x 42 = ?
Estimation number model:10 x 40 = 400
Answer: 365.4
400
Using your calculator, convert the fractions 3/8, 4/9, and 6/11 into decimals and percents. (Round your decimals to the nearest hundredth)
3/8 = 0.38, 38%
4/9 = 0.44, 44%
6/11 = 0.55, 55%
400
What is the area of the irregular shape below?
Area = (3 x 3) + (2 x 9) = 27 in2
400
Add parentheses to make the number sentence true.
56 = 14 + 8 + 6 x 2
56 = (14 + 8 + 6) x 2
400
A store is have a sale on gym shoes. The regular price of the High Flyers is $50. Now they are on sale for $38. What percent were they discounted?
$50 - $38 = 12
12/50 = 24/100 = 24% discount
400
Use paper and pencil to divide. (estimate your answer first)
25.2 / 6 = ?
Estimation number model:24 / 6 = 4
Answer: 4.2
500
Amanda set a goal of swimming 1000 laps over the summer. During the first two weeks of June, she swam 250 laps.
What fraction and percent did she swim in two weeks?
At this rate, how many weeks will it take to swim 1000 laps?
1/4, 25%
8 weeks
500
What is the perimeter and area of the triangle below?
Perimeter = 9 + 5 + 12 = 26 units
Area = (12 x 4) / 2 = 24 units2
500
Add parentheses to make the number sentence true.
7 + 7 x 3 - 8 = 4 x 7 - 8
7 + (7 x 3) - 8 = 4 x 7 - 8
500
Target offers golf clubs for $100 but is having a 30% off sale.
Costco offers golf clubs for $120 but is having a 40% off sale.
Which store offers the better deal?
Target has the better deal because the discounted price for their golf clubs is $70 and the discounted price for Costco's golf clubs is $72.
Target: 100 x 3/10 or 100 x 0.3 = 30
Target: 100 - 30 = $70
Costco: 120 x 4/10 or 120 x 0.4 = 48
Target: 120 - 48 = $72
500
Use paper and pencil to divide. (estimate your answer first)
4.7 / 8 = ?
Estimation number model: 4/8 = 0.5
Answer: 0.5875