Step-by-step explanation: first of all anything above 5 is 10 + whatever the number is if it’s not above 5 it stays the same but it has no second number just 0 like this so I’m gonna round 67 to the nearest 10 you see how in the tenths place is above five then I’m going to jump ahead to 70 but if it was 63 I would jump backwards and I would get 60 and then after you round up all the numbers add them together
hope this helped