Factors
List all the factors of 18
1, 18 2, 9 3, 6
List the first three multiples of 10
10, 20, 30
Is 3 prime or composite?
Prime- there is only one factor pair: 1 x 3
60 x 4
240
Eric is 11 years old. His dad is three times older than him. How old is his dad?
11 x 3 = 33 years old
List all the factors of 32
1, 32 2, 16 4, 8
List the first three multiples of 22
22, 44, 66
Is 20 prime or composite?
Composite. It has more than 1 factor pair. 1 x 20. 2 x 10, 4 x 5
7 x ____ = 28
4
Amber bought a pair of pants and a pair of shoes. The shoes cost 4 times as much as the pants. The pants cost $15. How much did the shoes cost?
15 x 4 = $60
List the factors of 19
1, 19
List the first two multiples of 36
36, 72
Is 182 prime or composite?
182 is composite. We can automatically know that because there is a 2 in the ones place. This means that it is divisible by 2 (2 is one of its factor)
The area of a rectangle is 56 square feet. One side measures 8 ft. What is the dimension of the other side?
7 feet. (8 x 7 = 56)
Each of the 4 students at the red table has 8 markers. The class has 5 times as many markers as the red table. How many markers does the class have in all?
160 markers.
4 x 8 = 32 markers at the red table
32 markers x 5 = 160 markers