Addition and Subtraction Grade 4 Brandon Mc Coy

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

Table of Contents 1. 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

What is Addition and Subtraction? ¨ ¨ ¨ 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. ú OVERALL, Addition and Subtraction makes numbers interesting and makes it fun to figure out big and small Go back to the numbers table to ¨ contents 2/23/2010 NEXT

The Initial Step(Addition) � � � 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…. Go back to the table to contents 2/23/2010 � 23 + 12 8 +7 NEXT

What is Addition? 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 Go back to the table to contents +12 NEXT � 2/23/2010

Addition Contin. . ¨ ¨ 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! ¡ ú How did we get that answer? Shouldn't the answer be 20 something? There are two ones in the tens columns and those Go back add up to "2. " You are able to get the "3" in the tens column to the because you carried a value from the ones column when you table to contents were adding your first set of numbers. NEXT 2/23/2010

Carrying Steps 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 for the tens column. 4. You would get the tens sum of "3" and that becomes the tens value for your answer. Go back to 5. The two values (3 and 2) make up your sum. You get the table to each of those values by adding numbers in each content column. ¨ NEXT 2/23/2010

What is Subtraction? � � 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) Your Doing Great!! Go back to the table to contents 2/23/2010 �Try and find the inverse of these numbers 56 - 22 Answer is…. . “ 34” YAY!!!!!! NEXT

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

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

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

¨ 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? A). 25 B). 28 C). 31 Go back to the table to contents 2/23/2010 NEXT

Problem #4 ¨ 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). 3 Go back to the table to contents 2/23/2010 B). 5 C). 2 NEXT

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

LETS PLAY A GAME!!!! Start Back to the table of contents 2/23/2010

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

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