Mentals
3x3x2x2
36
MENTAL MATH
155 + 245 = ?
400
What is a prime number?
A prime number is a number that only has 2 factors, including 1 and itself.
What is 40 divided by 4?
10
Mental Math
20 x 4 =
80
20 divided by 2
10
List the factors of 20
1,2,4,5,10,20
List the Prime numbers that are less than 10
2,3,5,7.
Complete a factor tree for the number 40. Write the prime factorization.
5x2x2x2=40
MENTAL MATH
13 x 3 =
39
8 x 5
40
Even numbers end in _ _ _ _ _
Odd numbers end in _ _ _ _ _
0,2,4.6,8
1,3,5,7,9
List the prime numbers between 10 and 20.
11,13,17 and 19
What is 19 divided by 2?
9 remainder 1
MENTAL MATH
4 x 8=
32
14,006 + 12,092
26,098
MENTAL MATH
98 + 499 =
597
Complete the prime factorization for the number 14.
2x7=14
Is 15 a prime or composite number?
Composite
Mental Math
10 x 20 = ?
200
10 x 12
120
MENTAL MATH
13 + ___ = 241
228
Complete the prime factorization for the number 50.
2x5x5=50
27 divided by 3
9
Mental Math
3 x 2=