This Week In Math
Rounding

3.NBT.1 Use place value understanding to round whole numbers to the nearest 10 or 100. 

Notes

My Favorite Strategy

1. Underline the place that you are rounding to:

              Ex: Round to the nearest hundred— 697

2. Circle the digit “right” next door to it because it is always “right” about rounding.

Ex: Round to the nearest hundred- 697

3. Focus on the number in the circle and sing the song:

If the number’s 1,2,3,4

Round it down right through the floor.

If the number’s 5,6,7,8,9

Round it up it’ll be just fine!

4. If the number is 1,2,3,4, place a “round down arrow” pointing to the number that stays  

     the same. 627

5. If the number is 5,6,7,8,9, place an arrow pointing up on the number that goes up!

697

6. The circle reminds you to turn it and everything else to a zero.

697= 700 627= 600

 

More Examples:

579= 600 248= 200 35= 40 42= 40

 

PowerPoint Presentations

Rounding Numbers
(To the Tune of The Army Chant)

Rounding numbers is so fun!

We will do it ‘til we’re done.

If the number’s 1, 2, 3, 4…

Round it down right through the floor!

If the number’s 5, 6, 7, 8, 9…

Round it up it’ll be just fine!

Round up…

Round down…

Rounding numbers

1, 2...3, 4

Rounding Videos
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