Fractions 4...1

Adding

100

1/4 + 1/4

2/4=1/2

200

1/2+3/4=

5/4=1 1/4

300

3/8 + 1/2

7/8

LCD

100

What is the Least Common Denominator of fractions 1/5 and 1/6?

30

200

What is the Least Common Denominator for 1/3 and 1/8? 

24

300

What is the Least Common Denominator for 1/4 and 1/10?

20

Equivalent Fractions

100

What is an Equivalent Fraction for 4/8?

1/2

200

What is an Equivalent Fraction for 9/27?

1/3

300

What is an Equivalent Fraction for 18/24?

3/4 or 6/8

Subtracting

100

3/4-1/4

2/4 or 1/2

200

11/12-3/12

8/12 or 3/4

300

3/4 - 1/8=

5/8

Prime Numbers

100

Which of these numbers are prime numbers? 

3, 6, 8

3

200

Which of these numbers are prime numbers?

8, 13, 16, 19

13 and 19

300

Which of these numbers are prime numbers?

2,3,4,5,6,7,8,9

3,5,7