673+458 -73-58
= (673 - 73) + (458 - 58)
= 600 + 400
= 1000
234+108+266+177+92+183
= (234 + 266) + (108 + 92) + (177 + 183)
= 500 + 200 + 360
= 700 + 360
= 1060
673+458 -73-58
= ( 673 - 73 ) + ( 458 - 58 )
= 600 + 400
= 1000
234+108+266+177+92+183
= ( 234 + 266 ) + ( 108 + 92 ) + ( 177 + 183)
= 500 + 200 + 360
= 1060