Question 3The numerical expression 38+(−5)7=−1956 shows that:(a) rational numbers are closed under addition.(b) rational numbers are not closed under addition.(c) rational numbers are closed under multiplication.(d) addition of rational numbers is not commutative.

Question 3The numerical expression 38+(−5)7=−1956 shows that:(a) r

1.	Question 3The numerical expression 38+(−5)7=−1956 shows that:(a) rational numbers are closed under addition.(b) rational numbers are not closed under addition.(c) rational numbers are closed under multiplication.(d) addition of rational numbers is not commutative.
Answer» Question 3 The numerical expression $\frac{3}{8} + \frac{(- 5)}{7} = \frac{- 19}{56}$ shows that: (a) rational numbers are closed under addition. (b) rational numbers are not closed under addition. (c) rational numbers are closed under multiplication. (d) addition of rational numbers is not commutative.