1 / 17

2/23/2010

Addition and Subtraction. Grade: 4. Brandon McCoy MSTI 131 February 13, 2010. Next. Lesson Plan. 2/23/2010. Table of Contents What is Addition and Subtraction? 2. The initial Step(Addition) 3. What is Addition? 4. Addition Contin .. 5. Carrying Steps 6. What is Subtraction?

charis
Download Presentation

2/23/2010

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. Addition and Subtraction Grade: 4 Brandon McCoy MSTI 131 February 13, 2010 Next Lesson Plan 2/23/2010

  2. Table of Contents • What is Addition and Subtraction? • 2. The initial Step(Addition) • 3. What is Addition? • 4. Addition Contin.. • 5.Carrying Steps • 6. What is Subtraction? • 7. Subtraction Contin.. • 8. Practice Problem #1 • 9. Practice Problem #2 • 10. Practice Problem #3 • 11. Practice Problem #4 • 12. Practice Problem #5 • 13. Game!!! NEXT 2/23/2010

  3. What is Addition and Subtraction? Go back to the table to contents NEXT 2/23/2010 • They both involved dealing with numbers • Addition can be used to Positively include anything. • Addition is used with a “+” sign, and Subtraction is used with a “-” sign. • Subtraction can be used to Take Away anything. • We use these terms to have a better understand on how numbers change. • OVERALL, Addition and Subtraction makes numbers interesting and makes it fun to figure out big and small numbers

  4. The Initial Step(Addition) Go back to the table to contents NEXT 2/23/2010 • Picture you have the numbers… • 23, 12 & 8, 7 • The first thing you do is place the numbers Vertically to make it easier. • Correct Order…. • 23 8 + 12 + 7

  5. What is Addition? Go back to the table to contents NEXT 2/23/2010 • Addition is the process of combining quantities. • To find the “Answer” (Sum), you combine the quantities together. • Start combing the last digits first. (i.e. 3+2), then the first digits (2+1).. • When put together you come up with *35* • Finding the Sum • 23 +12

  6. Addition Contin.. Go back to the table to contents NEXT 2/23/2010 • Key Tips: When adding Zero “0”to any number, the number stays the same. • Term: Carrying?! • Sometimes your adding gives you am answer that is greater than ten (10). Example, 6+6= 12. When you start to add larger numbers you will need to start “Carrying” Values. • Examples: 16+16= 32! • How did we get that answer? Shouldn't the answer be 20-something? There are two ones in the tens columns and those add up to "2." You are able to get the "3" in the tens column because you carried a value from the ones column when you were adding your first set of numbers.

  7. Carrying Steps Go back to the table to content NEXT 2/23/2010 • Here are the steps...1. Add the values in the ones column. In our example you add 6 + 6. The answer is "12".2. Write down the "2." That will be the ones value in your sum.3. Take that extra "1" and add it to the values in the tens column. Moving that "1" is called "carrying." Our example has you adding 1 + 1 + 1 for the tens column.4. You would get the tens sum of "3" and that becomes the tens value for your answer.5. The two values (3 and 2) make up your sum. You get each of those values by adding numbers in each column.

  8. What is Subtraction? Your Doing Great!! • 56 • - 22 Go back to the table to contents Answer is….. “34” YAY!!!!!! NEXT 2/23/2010 • Subtraction is the inverse of addition! • To find the “Answer” (Difference), you take away starting from the last digits (i.e. 6-2), and from the first digits (i.e. 5-2) • Try and find the inverse of these numbers

  9. Subtraction Contin… Go back to the table to contents NEXT 2/23/2010 • Key Tips: When subtracting Zero “0” to any number, the number stays the same.

  10. Practice Problems!! What is the Sum of this Addition problem? 61 +25 A). 77B). 86 C). 46 Go back to the table to contents NEXT 2/23/2010

  11. Problem #2 45 - 33 A). 11B). 78C). 12 Go back to the table to contents NEXT 2/23/2010 • What is the Differenceof this SubtractionProblem?

  12. Problem #3 A). 25B). 28C). 31 Go back to the table to contents NEXT 2/23/2010 • The Baseball team has a total of 20 players. If they cut 3 players, and add another 8 players from their farm system to their team, How many players does the baseball team have now?

  13. Problem #4 Go back to the table to contents NEXT 2/23/2010 • Billy had 15 sandwiches he had to give away on his field trip. If Billy gave the boys 7 sandwiches and the girls 6 sandwiches, how many sandwiches did Billy have left over? • A). 3B). 5C). 2

  14. Problem #5 Back to table of contents NEXT 2/23/2010 • What is the Sum of this Number- Remember to Carry.. 67 + 27 A). 84 B). 94 C). 81

  15. LETS PLAY A GAME!!!! Start Back to the table of contents

  16. Correct!! Go To Question… 1 2 3 4 5 2/23/2010

  17. TRY AGAIN!!! Go back and Try Again 1. 2. 3. 4. 5. 2/23/2010 • Keep Going. Do Not Give Up

More Related