Question

Answer 1

`68313 - ( 200 + 313)`

` = 68313 +  200 - 313`

` = 68313 - 313 + 200`

` = 68000 + 200`

` = 68200`

 

`773 xx 36 + 773 xx 65 - 773`

` = 773 xx ( 36 + 65 -1)`

` = 773 xx 100`

` =77300`

 

`35 xx 49 + 51 xx 36`

` = 35 xx 49 + 51 xx ( 35 -1)`

` = 35 xx 49 + 51 xx 35 + 51 x 1`

`= 35 xx 49 + 51 xx 35 + 51`

`= 35 + 51 xx ( 49 + 51)`

`= 35 + 51 xx 100`

` = ( 35 xx 100) + 51`

` = 3500 + 51

` = 3551`

 

Answer 2

a)68313-513

=67800

b)773 x (36+65-1)

773 x 100

77300

c) 1715 +1836

=3553