55×79=4345 6-0-2=4 50-40=10 19×76=1444 4+1+7=12 80+40=120 25×73=1825 5-1+3=7 70-20=50 28×79=2212 9-5+5=9 30+20=50 15×65=975 6+2+1=9 40+20=60 92×38=3496 3-2+3=4 100+100=200 64×96=6144 10+3+0=13 60+50=110 81×77=6237 8-7+1=2 20-10=10