Prime & Composite
19
Prime or Composite?
prime
What is the definition of a multiple?
when you multiply a number, you get a multiple.
Solve with place value discs:
43 x 2
86
Solve with place value discs:
526 ÷ 3
175 R1
Gia is opening a dance studio and needs to put new flooring in. The building is 46 feet long and 34 feet wide. How many square feet of flooring will she need?
1,564 sq. feet
56
Prime or Composite?
Composite
A factor is a number that evenly fits into another number.
300 x 40
12,000
900 ÷ 30
30
Mia is doing an art project for her mom. She will need enough yarn to go all the way around a board that is 23 inches by 42 inches. How many inches of yarn will she need?
130 inches of yarn
77
Prime or Composite?
Composite
List 5 multiple of 7 that are greater than 70
77, 84, 91, 98, 105 . . .
Solve with area model:
35 x 34
1,190
Solve with any strategy:
623 ÷ 4
155
Stephanie is making a quilt. She wants it to measure 85 inches by 95 inches. How many square inches of fabric will she need to buy?
She will need to buy 8,075 sq. inches of fabric.
1
Prime or Composite?
Neither!
What are the factors of 87?
1, 3, 29 and 87
Solve with standard algorithm:
14 x 23
322
Solve with standard algorithm:
301 ÷ 7
43
Derek is in charge of ordering uniforms for all of the baseball teams. Each kid will need 3 uniforms. Uniforms come in packs of 7, and he is planning on ordering 43 packs. How many kids can he give uniforms to?
He can give uniforms to 100 kids with one uniform left over.
List as many prime numbers as you can in one minute.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
What is the greatest multiple of 6 that is less than 50?
48
Solve with standard algorithm:
42 x 76
3,192
Solve with standard algorithm:
7985 ÷ 9
887 R2
Rory is printing posters for his Taylor Swift fan club. 9 times as many small posters were printed as large posters. If there were 72 large posters, how many more small posters were printed than large posters?
64 more small posters were printed than large posters.