Prime and Composite
Prime
List all the factors of 3
1,3
94 pencils come in a box. If 4 teachers share 3 boxes then how many pencils do each teacher get?
Each teacher gets 70 pencils.
96 x 3=
288
96 divided by 3
32
Is 24 prime or composite?
Composite
List all the factos of 15
1,3,5,15
The new classroom floor is 42 meters long and 39 meters wide. How many square meters is the classroom floor?
42 x 39= 1,638
65 x 6=
390
162 divided by 2
81
Is 29 prime or composite? List the factors.
Prime
1, 29
List the first five mutliples of 6.
6, 12, 18, 24
If there were 12 times as many women as men at the marathon race and there were 48 men, then how many women were at the race?
48 x 12= 576
29 x 56
1,624
1,254 divided by 2
627
Is 82 prime or composite?
Composite
What is the greatest multiple of 7 that is less than 60?
56
Uniforms are sold in packages of 8. If the store has 127 employees and each will be given 3 uniforms then how many packages need to be ordered?
127 x 3= 381
381 divided by 8= 47 R5
48 packages
Solve using area model
42 x 39=
1,638
427 divided by 3
142 R1
Is 24 prime or composite? List the factors.
Composite.
1, 2, 3, 4, 6, 8, 12, 24
List five multiples of 7 starting with 49
56, 63, 70, 77, 84
There are three numbers to open a combination lock to Sarahs locker. The first number is 12. The second two numbers can be multiplied together to give a product of 24. What are the other two possible numbers?
1 x 24= 24 2 x 12= 24 3x 8= 24 4 x 6= 24
Possible Combos:
12,1,24
12,24,1
12,2,12
12,12,2
12,3,8
12,8,3
12,4,6
12,6,4
Solve using area model
17 x 43=
731
36 hundreds divided by 9=
4 hundreds