1 / 13

Using a Chip Abacus to Show Subtraction

Using a Chip Abacus to Show Subtraction. Subtraction using a Chip Abacus. Hundreds. Tens. Ones. On your mat lay out the chips for the Minuend only. 249 - 25. Subtraction using a Chip Abacus. Hundreds. Tens. Ones. Now remove or take away 5 chips from the Ones column. 249 - 25.

amethyst-gardner
Télécharger la présentation

Using a Chip Abacus to Show Subtraction

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. Using a Chip Abacus to Show Subtraction

  2. Subtraction using a Chip Abacus Hundreds Tens Ones On your mat lay out the chips for the Minuend only 249 - 25

  3. Subtraction using a Chip Abacus Hundreds Tens Ones Now remove or take away 5 chips from the Ones column 249 - 25 Remove from the mat.

  4. Subtraction using a Chip Abacus Hundreds Tens Ones Remove or take away 2 chips from the Tens column 249 - 25 Remove from the mat.

  5. Subtraction using a Chip Abacus Read the answer on the mat, there are 2 in the Hundreds column, 2 in the Tens column and 3 in the Ones column. Hundreds Tens Ones • 249 • 25 • 223

  6. Subtraction using a Chip Abacus Hundreds Tens Ones On your mat lay out the chips for the Minuend only 121 - 25

  7. Subtraction using a Chip Abacus Since you do have enough chips in the Ones column to remove 5 chips you must move on of the chips in the Tens column over. Hundreds Tens Ones 121 - 25

  8. Subtraction using a Chip Abacus Now there are 11 chips in the Ones column. Hundreds Tens Ones 121 - 25

  9. Subtraction using a Chip Abacus Remove the 5 chips from the Ones column. Hundreds Tens Ones 121 - 25 Remove from the mat

  10. Subtraction using a Chip Abacus Now you need to remove 2 chips from the Tens column. Since there are not enough chips, one chip from Hundreds column will have to move over. Hundreds Tens Ones 121 - 25

  11. Subtraction using a Chip Abacus There are 11 chips in the Tens column. Remove the 2 chips from the Tens column. Hundreds Tens Ones 121 - 25 Remove from the matt.

  12. Subtraction using a Chip Abacus Now read the answer. There are 9 chips in the Tens column and 6 chips in the Ones column. Hundreds Tens Ones • 121 • 25 • 96

  13. Subtraction using a Chip Abacus Now you try these problems: 159 - 28 = 145 - 23 = 349 - 258 = 43 - 25 = 257 - 149 = 244 - 156 =

More Related