1 / 20

Rounding Numbers

Rounding Numbers. Rounding Numbers. ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded:. Rounding Numbers. ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded:

judson
Download Presentation

Rounding Numbers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rounding Numbers

  2. Rounding Numbers ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded:

  3. Rounding Numbers ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded: Ex) If you asked a friend how far it was to his house, how would you feel if he said,

  4. Rounding Numbers ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded: Ex) If you asked a friend how far it was to his house, how would you feel if he said, “Oh, it’s about 17.62955 kilometres away.”

  5. Rounding Numbers ♦ Sometimes, we don’t need a number to be completely accurate. In fact, sometimes we prefer it to be rounded: Ex) If you asked a friend how far it was to his house, how would you feel if he said, “Oh, it’s about 17.62955 kilometres away.” ♦ Rounding numbers makes communication easier!

  6. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth.

  7. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth. Ask, “Is that number closer to 16.8 or 16.9 ?”

  8. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth. Ask, “Is that number closer to 16.8 or 16.9 ?” How do you decide?

  9. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth. Ask, “Is that number closer to 16.8 or 16.9 ?” How do you know? Check the “key” digit to the right of the tenths column.

  10. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth. Ask, “Is that number closer to 16.8 or 16.9 ?” How do you decide? Check the “key” digit to the right of the tenths column. THINK: Is 87 closer to 80 or 90 ?

  11. Rounding Numbers ♦ Ex) Round 16.8722 to the nearest tenth. Ask, “Is that number closer to 16.8 or 16.9 ?” How do you decide? Check the “key” digit to the right of the tenths column. THINK: Is 87 closer to 80 or 90 ? The number equals 16.9 rounded to the nearest tenth.

  12. Rounding Numbers RULE:

  13. Rounding Numbers RULE: Locate the position of the final digit. If the key digit is 5 or greater, then round the final digit up. Otherwise, the final digit stays the same.

  14. Rounding Numbers ♦ Ex) Complete the following table:

  15. Rounding Numbers ♦ Ex) Complete the following table:

  16. Rounding Numbers ♦ Ex) Complete the following table:

  17. Rounding Numbers ♦ Ex) Complete the following table:

  18. Rounding Numbers ♦ Ex) Complete the following table:

  19. Rounding Numbers ♦ Ex) Complete the following table:

  20. Rounding Numbers ♦ Ex) Complete the following table:

More Related