Adding & subtracting fractions

What is 2/3 + 1/6?

1. A5/6
2. B3/9
3. C3/6
4. D5/9

What is 1/2 − 1/6?

1. A2/6
2. B1/4
3. C2/8
4. D1/3

To work out 2/3 + 1/6, first rewrite 2/3 as ?/6. What is the numerator?

1/2 is the same as 3/6.

To add 1/2 + 3/6, first rewrite 1/2 as ?/6. What is the numerator?

To add 2/3 + 3/9, first rewrite 2/3 as ?/9. What is the numerator?

2/3 − 5/9 = n/9. What is n? (First write 2/3 as 6/9.)

To add 1/3 + 6/9, first rewrite 1/3 as ?/9. What is the numerator?

1/2 − 4/10 = n/10. What is n? (First write 1/2 as 5/10.)

2/3 − 4/12 = n/12. What is n? (First write 2/3 as 8/12.)

To add 1/3 + 7/12, first rewrite 1/3 as ?/12. What is the numerator?

To add 2/3 + 1/6, first rewrite 2/3 as ?/6. What is the numerator?

19 is less than 11.

10 is greater than 3.

Put these numbers in order, from smallest to largest.

Which symbol makes this true? 19 __ 11

1. A<
2. B>
3. C=

Which symbol makes this true? 14 __ 11

1. A<
2. B>
3. C=

17 is less than 18.

Which symbol makes this true? 3 __ 6

1. A<
2. B>
3. C=

19 is greater than 20.