20+40 is 608 and 7 both have 5 in them so that’s another 10 so we get 70And 8-5=3 and 7-5=2 so

20+40 is 608 and 7 both have 5 in them so that’s another 10 so we get 70And 8-5=3 and 7-5=2 so we have 5That gives us 75 -- source link