Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   1 is the additive identity

   Statements

   1. 0 is the additive identity
   2. 1 is the multiplicative identity
   3. 1 is the additive identity

2. False statement

   Closure means the answer is a whole number

   Statements

   1. Closure means the answer is a whole number
   2. Rationals are closed under addition
   3. Rationals are closed under multiplication

3. False statement

   a(b + c) = ab + ac is associativity

   Statements

   1. a + b = b + a is commutativity
   2. a(b + c) = ab + ac is associativity
   3. (a + b) + c = a + (b + c) is associativity

Explanation