Tuesday Night Homework

MATH TEST TOMORROW!!
Please go over your review from today's class. This covers everything you will have to know for the test. Also, see below for our steps for rounding if you need to go over it with your parents!

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Math: Rounding

When rounding, first find your rounding place. Remember your place value. If the question says "Round to the nearest hundred", the number in the hundreds place is in your rounding place.

In the number 9365, the number in your rounding place is the 3.

After you find your rounding place (underline it if you need to!), look to the number to its right. In this case you would look at the 6. Now you have to remember your rounding rules.

1-4 rounds down to 0
5-9 rounds up to 10

10 & 0 remain the same.

Decide if the number to the right of the rounding place rounds up or down. So:

9365 "3" is in the rounding place. "6" is to its right. We know 6
rounds up to 10.

Now the number in your rounding place (3) can only do two things: It will go up one or remain the same. Therefore, 3 will either stay a 3 or go up to four. If you round up, the 3 changes to a 4. If you round down, the 3 stays the same.

Therefore, because we know 6 rounds up, we know our 3 is going to become a 4.

EVERYTHING to the right of the rounding place turns to 0
EVERYTHING to the left of the rounding place remains the same.

Therefore, the number 9365, when rounding to the nearest hundred, rounds up to 9400.

Here are some more examples:

Round to the nearest 10: 89,238 rounds up to 89,240
Round to the nearest 1,000: 925,319,275 rounds down to 925,319,000
Round to the nearest 100: 92,385 rounds up to 92,400

To review, here are the steps:

1) Find your rounding place
2) Look at the number to the right of the rounding place
3) Round up or down. The number in the rounding place will go up 1 or stay the same.
4) Change all numbers to the right of the rounding place to 0
5) All numbers to the left of the rounding place stay the same


I hope this helps you!! Happy studying :)