Arrange the following integers in descending order:

-31, -13, -49, 4, 37, -9, -52

Fill in the blanks:

(i) 0 is greater than every …………… integer.

(ii) Every negative integer is less than every …………… integer .

(iii) For any two positive integers a and b, if a < b, then -a …………… -b .

(iv) Modulus of a negative integer is always …………… .

(v) The largest negative integer is …………… .

(vi) The smallest positive integer is …………… .

Add the following integers :

73 and -37

Add the following integers :

-26 and -45