24 6=4 6 6=12 6 3=18 25 5=5
368>3568 423>2635 139>1359
400+50500 300+4005000 852-416325
990-300700 1000-380620 435+77435+770
4+3= 6+9= 15-8=
24+3= 56+9= 65-8=
324+3= 256+9= 165-8=
724+3= 456+9= 465-8=
924+3= 856+9= 965-8=