This document provides an overview of addition: - Addition is combining two or more sets to form a new set. It uses the symbol "+" and involves addends and a sum. - When adding 3 or more numbers, it is easiest to group the addends and add them together in steps to find the total sum. - Examples are provided of adding multiple addends horizontally and vertically.

1. Mathematics
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2. Addition

3. What is
Addition?

4. Addition
is putting together
two or more sets to form
a new set.

5. In addition, we use the symbol

6. 2 + 1 = 3
Parts of Addition
Addends Sum

7. 2 + 1 = 3
Parts of Addition
Addends Sum
2 + 1 = 3
any numbers that are
added together.
the result of adding
two or more numbers

8. are
and
Example:
2 + 1 = 3

9. are
and
Example:
2 + 1 = 3
Addition Sentence

10. are
and
Example:
and are

11. are
and
Example:
6 6
and are 12

12. How to add the numbers
with three addends?

13. + + =

14. + + =
3 + 2 + 1 = N

15. When adding 3 or more
addend, group the
addends to easily find
the sum:

16. + + =
3 + 2 + 1 = N
?

17. Step 1: Add first the addends
inside the parenthesis.
(3 + 2)+ 1 =
N
5 + 1 = N

18. Step 2: Add the sum of the
addends inside the parenthesis to
the third addend.
(3 + 2)+ 1 =
N
5 + 1 = N

19. (3 + 2)+ 1 =
N
5 + 1 = N
6 = N

20. (3 + 2)+ 1 = N
5 + 1 = N
6 = N
Adding numbers horizontally:

21. 3
2
+ 1
Adding numbers vertically:
5
6

22. + + =
3 + 2 + 1 = 6

23. Example:

24. 5+4 + 3 =

25. (5 + 4) + 3 =
9 + 3 = 12

26. 4 + 6 + 5 =

27. (4 + 6)+ 5 =

28. (4 + 6)+ 5 =
10 + 5=15

29. 9 + (2 + 8) =

30. 9 + (2 + 8) =
9 +10 =19

31. Try This:

32. Directions:
Add the
numbers in the
parenthesis first.

33. 1. 8 + (4 + 6)=
2. (5+5)+7=
3. 6+(1+9)=
4. (5+3)+10=

34. 1. 8 + (4 + 6) =
8 +10 = 18

35. 2. (5+5)+7=
10 + 7 = 17

36. 3. 6+(1+9)=
6 + 10 = 16

37. 4. (5+3)+10=
8 + 10 = 18

38. Mathematics
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