Factors + Multiples
Rounding + FEE
Prime + Composite
LCM + GCF
Area + Array
100
Name all the factors of 12
1, 2, 3, 4, 6, 12
100
Round 495 to the nearest hundreds
500
100
Is 15 prime or composite?
composite
100
Write the first six multiples of 2 and 3. Find the common multiples.
6 and 12
100
Write a multiplication sentence using the array model. (with the answer)
(10 x 9) + (3 x 9) = 117
v v
90 + 27 = 117
200
Name the first five multiples of 6
6, 12, 18, 24, 30
200
Use Front End Estimation (FEE) for the number 681
600
200
What is the difference between prime and composite?
A) prime has only 1 set of factors/composite has multiple sets of factors
--or--
B) prime has multiple sets of factors/composite has only 1 set of factors
A) prime has only 1 set of factors/composite has multiple sets of factors
200
What are the factors of 3 and 9?
Find the Greatest Common Factor (GCF).
3
200
Recreate the array below. Circle your answer.
205 (teacher to show work)
300
What is the sum of the first two multiples of 4?
12 (4+8)
300
Add 312+409. Then round the answer to the nearest tens.
721=720
300
Find all of the composite numbers below:
27, 17, 37, 45
27 and 45
300
True or false: There are millions of multiples of 2.
True! Multiples go on forever. Factors end.
*Can you ever have a LCM of 1?*
300
Write a multiplication sentence for the area figure.
(6 x 10) + (6 x 5) = 90
v v
60 + 30 = 90
400
Name all the factors of 23
1 and 23
400
Use FEE for 691+27 = ??
600+20=620
400
Find all of the prime numbers
23, 9, 100, 13
13 and 23
400
Find the mistake:
The mistake is that Father found factors and not multiples of 5 and 10! The LCM of 5 and 10 would be 10.
400
Recreate the array model below. Circle your answer.
252 (teacher to show work)
500
Name the first four multiples of 12
12, 24, 36, 48
500
Look at the underlined number. 273
If we're rounding to the nearest tens, will the #...
A) stay the same
B) round up
A) stay the same
500
Find the factors of 15.
Which of those factors are prime?
(remember, 1 is not prime or composite)
The factors of 15 are: 1, 3, 5, 15
The prime factors are 3 and 5
500
Find the first six multiples of 6 and 9. What is the least common multiple?
LCM = 18
500
Draw an Array model of 12 x 3. Circle your product.
36 (teacher to show diagram)
