`ttcolor{pink}{@Oris}`

`a) 125xx6xx8`

`=(125xx8)xx6`

`= 1000xx6`

`=6000`

`--------------`

`b) 8xx12xx125`

`=(8xx125)xx12`

`=1000xx12`

`=12000`

`--------------`

`c) 8xx25xx2xx4xx5xx125`

`=(8xx125)xx(25xx4)xx(2xx5)`

`=1000xx100xx10`

`=1000000`

`--------------`

`d) 998+28`

`= 998+2+26`

`=1000+26`

`=1026`

`a)`

`125 xx 6 xx 8`

`= (125 xx 8) xx 6`

`= 1000 xx 6`

`= 6000`

`b)`

`8 xx 12 xx 125`

`= (8 xx 125) xx 12`

`= 1000 xx 12`

`= 12000`

`c)`

`8 xx 25 xx 2 xx 4 xx 5 xx 125`

`= (8 xx 125) xx (25 xx 4) xx (2 xx 5)`

`= 1000 xx 100 xx 10`

`= 1000000`

`d)`

`998 + 98`

`= (1000 - 2) + (100 - 2)`

`= (1000 + 100) - (2 + 2)`

`= 1100 - 4`

`= 1096`