Merry Christmas Math

Front

What is the total length of ribbon in yards if each roll has 20 yards and there are 4 rolls?

Back

80 yards

Front

How do you calculate the cost of a Christmas tree that is 7 and 1/2 feet tall if the first 5 feet cost $5 each and each additional foot costs $4?

Back

Cost = (5 feet * $5) + (2.5 feet * $4) = $25 + $10 = $35

Front

If Mr. Green is putting Christmas lights around 8 windows, each 3 and 1/2 feet wide and 5 feet long, how do you calculate the total feet of lights needed?

Back

Total length = 8 windows * (2 * (3.5 + 5)) = 8 * 17 = 136 feet

Front

What equation represents the scenario where Dasher has twice as many reindeer treats as Prancer and Comet has 3 more than Prancer, with a total of 43 treats?

Back

(x) + (2x) + (x + 3) = 43

Front

How many children are seen by 400 Santas if each sees 125 children a day for 30 days?

Back

Total children = 400 Santas * 125 children/Santa * 30 days = 1,500,000 children

Front

What is the formula to convert yards to feet?

Back

1 yard = 3 feet, so multiply the number of yards by 3 to get feet.

Front

What is the perimeter of a rectangle if the length is 5 feet and the width is 3.5 feet?

Back

Perimeter = 2 * (length + width) = 2 * (5 + 3.5) = 17 feet.

Front

How do you find the total cost of wrapping packages if each package takes 3 feet of ribbon and you have 80 feet of ribbon?

Back

Total packages = Total ribbon / ribbon per package = 80 feet / 3 feet = about 26.67 packages.

Front

What is the cost of a Christmas tree that is 7.5 feet tall if the first 4 feet cost $6 each and each additional foot costs $4?

Back

Cost = (4 feet * $6) + (3.5 feet * $4) = $24 + $14 = $38.

Front

How do you calculate the total area of lights needed for 8 windows that are 3.5 feet wide and 5 feet tall?

Back

Area = number of windows * (width * height) = 8 * (3.5 * 5) = 140 square feet.