Evaluate the following products without actual multiplication.
(i) `101 xx 99`
(ii) `999 xx99`
(iii) `50 (1)/(2) xx 49 (1)/(2)`
(iii) `501 xx 501`
(iv)` 30.5 xx 29.5`

Answer

`(i) 9999`
(ii) 998011
(iii) `(9999)/(4)= 2499 (3)/(4)`
(iv) 251001
(v) `899.875`