Many third graders seems to be having a difficult time rounding even the simplest numbers – those between 11 and 99. We’re only rounding to the tens and hundreds place and yet some of students just don’t “get” it. Even though the majority understand rounding, if I’m having trouble reaching some, I know other third grade teachers are having trouble as well. Here is one of my strategies for helping students with rounding.
Many teachers say, round down and round up. What happens with these instructions is that the term “round down” to many students mean if the number is 32, they are to take the tens place and make IT smaller! So they end up with 20 instead of 30!
WHO’S THE BOSS?
It is the TENS place that is the boss when rounding to the tens place. What I tell my students is that they LOOK at the ones place; 0 – 4, the TENS PLACE STAYS THE SAME! If the ones place is 5 – 9, ADD ONE TO THE TENS PLACE.
Yes, the TENS place is the BOSS when rounding to the tens, but keep in mind, the tens place DOES NOT round down. It either stays the same, or it increases by one.
Happy Rounding!