Revision of rational number

1. REVISION

4.  Def:- Rational numbers :- The numbers are of
the form
i)p/q form
ii)p,q £ Z
iii)q≠ 0
 Rational numbers are indicated by capital “
Q” (QUOZIENTE---ITALIAN---QUOTIENT)

5. CLOSURE PROPERTY:-If a , b are any
two rational numbers then they are under
1. ADDITION a+b€Q--------- CLOSED
2. SUBTRACTION a-b€Q ---------CLOSED
3. MULTIPLICATION axb€Q---------CLOSED
4. DIVISION a÷bɆQ -------- CLOSED

6. If a , b are any two rational numbers then
they are under
1. ADDITION a+b=b+a-------- TRUE
2. SUBTRACTION a-b≠b-a ---------- - FALSE
3. MULTIPLICATION axb=bxa------------TRUE
4. DIVISION a÷b ≠ b÷a ------------FALSE

7.  The rational number which is neither positive nor negative ?
ANSWER:- “ 0”
 Rational numbers are closed under which mathematical operations?
ANSWER:- ADDITION , SUBTRACTION, MULTIPLICATION
 Rational numbers are closed not under which mathematical
operations
ANSWER:- DIVISION
 Rational numbers satisfies commutative property under which
mathematical operation?
ANSWER :- ADDITION, MULTIPLICATION
 Rational numbers are indicated by which letter?
ANSWER:- CAPITAL “ Q”
 The word “ quoziente” is derived from which language?
ANSWER:- ITALIAN