Prime and Composite
What is a prime number?
Model 4 x 17 using the standard algorithm.
Answers 68 on personal whiteboard.
Model 58/9 using the standard algorithm.
Answers 6 R 2.
Emma baked 44 cupcakes. She wants to share them with Learta, Jonah and Krishna. How many cupcakes will each student get?
They will each get 11 cupcakes.
What is the fifth multiple of 8?
40.
What is a composite number?
A number with more than two factors/
Model 28 x 13 using the place value chart.
Answers 364 on personal whiteboard.
Model 407 / 3 on the place value chart.
Models 135 R 2 on the chart.
Ms. Phelan wants to put a carpet down in the classroom. The classroom is 17 feet wide and 21 feet long. If she has 420 square feet of carpeting how much will she have leftover?
She will have 63 square feet of carpeting leftover.
What is 11 x 8?
88.
Name 5 composite numbers.
Model 36 x 41 using an area model.
Answers 1,476 on personal whiteboard.
Model 1,408 / 4 on the place value chart.
Answers 352.
8 slices of pizza come in a large pizza pie. If 6 friends are sharing 3 pizzas, how many slices will each friend get?
They will get 4 slices each.
List the factors of 28.
1, 2, 4, 7, 14, 28.
What is the only even prime number?
2
Multiply 32 x 17 showing the partial products.
Answers 544 showing all partial products. (14, 20, 210 and 300).
Divide 3417 / 9 using the standard algorithm.
Answers 379 R 6.
Ms. Phelan needs 124 boxes of tissues for the year. If they come in packs of 6, how many boxes will she need to order?
She will need to order 21 boxes. (20 x 6 = 120...that's four boxes short!).
List the factors of 17.
1, 17
Is 51 prime or composite?
Composite!
Solve 43 x 56 using the standard algorithm.
Answers 2,408 on personal whiteboard.
Divide 13,547 / 4 using standard algorithm.
Answers 3,386 R 3.
Markian went to a soccer tournament this weekend and played two games. All together, the goals the number of goals that he scored in the first and second games multiply together to equal 24. What are all the possible combinations of the the number of goals he scored in games 1 and 2.
8 and 3
6 and 4
24 and 1
12 and 2
True or false:
A number has a limited number of factors and an unlimited number of multiples.
True!