Calculate mentally, using adjustment. Write down a sequence of numbers indicating intermediate steps in your thought process. The first one is done for you. (a) 78+46 Think 80+44, 120, 124 (b) 597 +228 (c) 606-369 (d) 377-204 (a) Note that 78 +46 = (78+2)+(46-2)=80+44-80+40 +4=120+4=124. Thus, to find 78 +46 using adjustment, think 80 + 44, 120,