(37+46)-38= 37-37+46-1=45 (37+46)-29=37-27+46-2=44+10=54 (37+46)-58=37-37+46-21=25 (45+47)-45=45-45+47=47 (69+12)-57=69-50+12-7=19+5=24 (36+38)-27=36-26+38-1=10+37=47