Multiplication
23 x 2
46
639 divided by 3
213
what are the first 5 multiples of 2 (start with 2)
2, 4, 6, 8, 10
find the missing factor:
45 = 5 x __
9
which of the following is a prime number
21 7 13 36 15 4 23
7, 13, 23
394 x 6
2, 364
56 divided by 2
28
what are the first 5 multiples of 7 (start with 7)
7, 14, 21, 28, 35
list the factors of 40
1,2,4,5,8,10,20,40
what is a composite number? Name an example
a number with multiple factors
3, 254 x 5
16, 270
8,075 divided by 6
1,345 R 5
is 39 a multiple of 3? Why?
yes, because 39 can be divided exactly by 3
list the factors of 35
1,5,7,35
97 divided by 3
32 r 1
87 x 16
1,392
6,100 divided by 8
762 R 4
find the first common multiple of 3 and 4
12
what is a prime number? name an example
a number that can only be divided by one and itself. an example could be 11
123 x 7
861
Estimate by rounding products:
2, 874 x 7
3, 000 x 7 = 21,000
8,323 divided by 7
1, 189
what is the first common multiple of 5 and 6
30
what are the common factors of 24 and 52
1, 2, 4
5,424 divided by 6
904