# Math BCR's

6.C.2.a- Determine the reasonableness of sums and differences.

Mrs. Weeg's students are writing to friends in Japan. They want to tell their friends about how many students attend Delmar Elementary School in round numbers.

Part A: There are 774 students in the Traditional calender school. There are 210 students in the Year Round school. About how many students attend Delmar Elementary School altogether?

Part B: Use what you know about rounding numbers to explain why your answer is correct. Use words and/or pictures in your explanation.

John said:

There are about 1000 students in our school. I know my answer is correct because I rounded to the nearest hundred and that's how I got my answer.

Kelsey said:

There are about 1000 students in our school. I know my answer is correct because I rounded and added.

Rajanea said:

There are about 1000 students in our school. I know my answer is correct because I rounded to the nearest hundred.

Michael said:

There are about 1000 students in our school. I know my answer is correct because I rounded up the numbers.

Savannah said:

There are about 1000 students in our school. I know my answer is correct because I added and rounded to the nearest hundred.

Kim said:

There are about 1000 students in our school. I know my answer is correct because I rounded and added.

Web page created by Hannah, a 5th grade Generation Y student.
May, 2004