Hi SherylNorton....

For many children, rounding numbers or estimating are very difficult concepts for them to grasp. I think they don't see the point in estimation. What purpose does it serve?

I have a second grader and when he was doing homework on estimation for the first time, he was struggling. He understood the concept well but didn't know why he needs to "estimate". Then when he was given the homework of adding really large numbers (139 + 946) - then he knew why he needs to estimate. Because with estimation, he can just add 100 + 900 = 1000. Adding 100 + 900 is certainly much easier than adding 139 + 946.

I don't know if there is necessary a good way of explaining rounding number and estimation to the your child. Make a number line chart and follow these basic rules work:

1. Rounding to Tens: If the number in the ones value is less than 5, round down. If the number in ones value is less than 5, round up.

For example: 14 rounding to 10

For example: 15 rounding to 20

2. Rounding to Hundreds: If the number in the tens value is less than 5, round down. If the number in tens value is less than 5, round up.

For example: 140 rounding to 100

For example: 150 rounding to 200

Below are some worksheets for your child to practice.

Hope this helps!

Vicki

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