Vocabulary
What is a factor, or factor pair?
A factor (or factor pair) is a number that another number is divisible by. For example, 6 is a factor of 12, because 6x2=12, or 12÷6=2. So the factor pair would be 6 and 2.
All of the factors of 12 would be 1,2,3,4,6, and 12.
700 minutes!
4 x (2+2) =
16
What is a multiple?
A multiple of a number is made by multiplying the number by 1, 2, 3..., etc., or skip-counting to find a string of multiples. For example: 4, 8, 12, 16, 24... are all multiples of the number 4. 40 is also a multiple of the number 4 because 4x10=40.
There are 208 cookies to be put into boxes at the bakery. If each box can fit a dozen cookies, how many boxes will be filled? How many cookies will be left over?
17 boxes will be filled, and 4 cookies will be left.
[4x(5-2)] -2 =
10
What is a square number?
4, 9, 25 are all square numbers because they have factor pairs of the same number like this:
2x2=4
3x3=9
5x5=25
So 4, 9, and 25 are all square numbers. If you drew an area model, you could make a perfect square.
Scout has a binder of Pokemon cards. He has 87 pages completely filled up. If each page can hold 12 cards, how many cards does he have in his collection?
Scout has 1044 cards.
52 x 11
572
What is a composite number?
A composite number has more than one factor pair. For example: 10 is a composite number because 2x5 is a factor pair, as well as 1x10.
Mrs. Butera is setting up tables in the gym for a meeting. Each table can seat 12 people. How many tables will she need to set up to fit 174 people?
She will need to set up 15 tables.
275 ÷ 5
55
Define Prime Number.
A prime number is a number whose only factors are 1 and itself. For example, 11 is a prime number because its only factors are 1 and 11.
An apple orchard has 672 trees. Trees are planted in 32 neat rows with the same number of trees in each row. How many trees are in each row?
There are 21 rows of trees.
384 ÷ 24
16