How to Round and Estimate

1
How to Round and Estimate

• I can round whole numbers to the nearest tens,
  hundreds, and thousands place
• I can make ballpark estimates
• I can select and use applications effectively and
  productively

2
What are the rules for rounding?

• Find the digit.
• Look next door.
• Five or higher,
• Add one more.
• Four or less,
• Let it rest.

3
To round to the nearest tens place, find the
digit in the tens place 24 Tens place
4
Look next door

• 24
• Four or less, let it rest.
• That means the 4 is telling the 2 to rest,
  and the 4 becomes a 0.
• 24 rounded to the nearest ten is 20

5
More rounding to the nearest ten

• Round this number to the nearest ten
• 348
• Find the digit.
• Look next door.
• 348

6
More rounding to the nearest ten

• Round this number to the nearest ten
• 348
• Five or more, add one more.
• The 8 is more than five
• Add one more to the 4
• 348 350
• The 4 becomes a 5
• The 8 becomes a 0

7
Are you ready to try some on your own?

• http//www.funbrain.com/tens/index.html
• Choose from the game box on the right, called
  Round Number, and decide which level you would
  like to begin. See if you can reach the highest
  level, Super Brain.

8
How to Round to the Nearest Hundred

• Find the digit
• 572
• Hundreds place
• Look next door.
• 572

9

• 572
• Five or more, add one more.
• 7 is more than five
• Add one to 5 to make it 6
• Change 7 and 2 to 00
• 572 600

10
Are you ready to try some on your own?

• http//www.mrnussbaum.com/rounding.htm
• Choose a drill on rounding to the nearest
  hundred, or
• Choose a game to play on rounding. You may need
  to watch a tutorial first.

11
How to Round to the Nearest Thousand

• Find the digit.
• 3078
• Look next door.
• 3078

12

• Look next door.
• 3078
• Four or less, let it rest
• The 0 is less than four, so the 3 will rest.
• The 078 becomes 000
• 3078 3000

13
Are you ready to try some on your own?

• http//www.mrnussbaum.com/rounding.htm
• Choose a drill on rounding to the nearest
  thousand, or
• Choose a game to play on rounding. You may need
  to watch a tutorial first.

14
How to Estimate

• Watch the instructions on how to play
  http//www.mrnussbaum.com/maximumcapacity.htm
• You may play the game afterwards
• Estimation is like rounding to the highest place
  value digit.
• 4367 4000