Rounding Numbers - Math Antics

Rounding numbers is giving an _____.

• exact number. 

• estimate

• additional number

Rounding to the nearest 10,  1863 would be rounded to...

HINT: Which number is it closer to?

• 1860

• 1870

Rounding to the nearest 100, 1863 would be rounded to 

• 1800 

• 1900

Rounding the number to the nearest 1000, 1863 would round to 

• 2000

• 1000

True or False. Sometimes rounding is useful because we don't need to know the exact number. 

• True

• False

What happens to the digits that are less than the target number?

• They all become zero

• They stay the same.

What happens to the numbers that are greater than the target number?

• They turn to zero.

• They all stay the same.

What are the two things that could happen to the target number? Click all that apply.

• The target number stays the same.

• 1 is added to the target number.

•  1 is subtracted from the target number.

Now that you know what can be done to the target number, how do you know what to do next? Read carefully!

• Look at the number to the right of the target number.

  If it is less than 5, keep the target number the same.

• Look at the number to the right of the target number.

  If it is less than 5, increase the target number by one.

What happens to the target number if the number to its right is greater than 5?

• You add 1 to it. 

• You keep it the same.