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Finding the Sum of Two Numbers2nd GradeChristina KilgoreApril 14, 2010Math Facts

Finding the SumAdding two number together

3 + 2 = 56 + 6 = 125 + 6 = 113 + 4 = 79 + 1 = 108 + 6 = 14

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Rule to Finding the SumAdding in ColumnsWhen adding numbers in columns, all the ones are in the right column and the 10s to the left.

Addition starts in the ones column.

If the sum is more then one digit, leave the last digit at the bottom of the column and carry the first digit to the top of the next column.4

Finding the Sum in Columns 3+ 2 . 5 5+ 6 . 11

9+ 1 . 10

6 + 6 . 12

3+ 4 . 7

8+ 6 . 14

Finding the Sum3 + 2 = 5 or 3 + 2 . 5

+ = 5

+ = 5

Finding the Sum6 + 6 = 12 or 6 + 6 . 12

+ = 12 + = 12

Quiz 1Write the following problems in column form and then add them together.

5 +9 =8 + 7 =9 + 2 =6 + 9 =8 + 8 =7 + 7 =

Correct Answers 1Check your answers

5+ 9 . 14 6+ 9 . 15 8+ 7 . 15 8+ 8 .16 9+ 2 . 11 7+ 7 . 14

Incorrect Answers 1 5+ 9 . 15 6+ 9 . 16 8+ 7 . 14 8+ 8 .17 9+ 2 . 12 7+ 7 . 15

Quiz 2Write the following problems in numeric form and find the sum of he two numbers.

+ + =

+ + = =

Correct Answer 22 + 2 = 4 or 2 + 2 . 43 + 4 = 7 or 3 + 4 . 7

Incorrect Answers 22 + 2 = 4 or 2 + 2 . 53 + 4 = 7 or 3 + 4 . 6

Quiz 3 (Critical Thinking)You will receive full credit for trying your best.Find the sum. 22+ 11 .?

Answer Correct 322+ 11 .33

Incorrect Answer 3 22+ 11 . 34

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The EndThank You

Referencehttp://www.ehow.com/facts_5156901_math-rules-addition.html

http://www.graves.k12.ky.us/powerpoints/elementary/