259+56=259+(31+25)=(279+31)+25=300+25=325
313+88=313(87+1)=(313+87)+1=400+1=401
577+44=577+(33+11)=600+11=611
94+628=628+(82+12)=(628+82)+12=700+12=712
181+438=438+(72+109)=500+109=609
166+255=166+(44+211)=(166+44)+211=200+211=411
1205+796=796+(304+901)=(796+304)+901=1000+901=1901
2088+233=2088+(122+111)=(2088+122)+111=2200+111=2311