The difference of two integers jis always an integer.

The sum of two integers is always an integer.

The sum of two integers is not an integer.

Following are some pairs of integers .Observe the following table and complete it . "Statement" " ""Obervation" (i) 17 +23 =40 " " "Result is an integer" (ii) -10+3=... " " ...................... (iii) (-75)+18= ...... " " ....... (iv) 19 +(-25)=-6 " " "Result is an integer" (v) 27+(-27)=..... " " ............ (vi) (-20)+0=...... " "............. (vii) (-35)+(-10)=........ " " ......... What do you observe ? Is the sum of two intergers always an integer? Did you find a pair of integers whose sum is not an integer ?

Which of the following statements are true? The sum of three different integers is always zero.

Which one of the following statement is true? (i) The sum of two irrational numbers is always an irrational number. (ii) The sum of two irrational numbers is always a rational number. (iii) The sum of two irrational numbers may be a rational number or irrational number. (iv) The sum of two irrational numbers is always an integer.

Justify the statements whether sum of two integers is always greater then their difference .

Which of the following statements are true? the absolute value of an integer is always equal of an integer is always equal to the integer.

Product of two integers is always greater than the sum of integers.