Question

show that rational numbers are closed under addition and subtraction by taking the number 1 /7 and - 2 / 3. ​

Answer 1

Answer:

11/21,17/21

Step-by-step explanation:

a) 1/7 +-2/3

3+-14/21

3-(-14)=11

11/21.

b)1/7-2/3=?

3-(-14)/21

3+14=17/21

17/21.

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