Question

rational numbers are closed under the operations of addition, subtraction and multiplication​

Answer 1

So, adding two rationals is the same as adding two such fractions, which will result in another fraction of this same form since integers are closed under addition and multiplication. Thus, adding two rational numbers produces another rational number. Rationals are closed under addition (subtraction).

Answer 2

Answer:

ᕼᗴᖇᗴ Iᔕ Ƴᗝᑌᖇ ᗩᑎᔕᗯᗴᖇ!ᕼᗴᖇᗴ Iᔕ Ƴᗝᑌᖇ ᗩᑎᔕᗯᗴᖇ!

Explanation:

The set of rational numbers is closed under addition, subtraction, multiplication, and division (division by zero is not defined) because if you complete any of these operations on rational numbers, the solution is always a rational number