for grade-1 Math; concept of addition

1. Prayer

2. Grade-1 peony

3. Comprehension of
addition

4. Lesson 1

5. REVIEW
READ the numbers
19 55

6. REVIEW
READ the numbers
219 455

7. REVIEW
READ the numbers
2,022 3,455

8. Great
Job!!

9. REVIEW
count the numbers in each
set.
6
10

10. REVIEW
count the numbers in each
set.
9
12

11. Preparatory Activity
Helping one another
It was Saturday
morning. Alona and
Cora helped their
mother wash the dishes.
Let us count the plates

12. alona
count the plates in each set.
5
3
cora

13. Preparatory Activity
How many plates did
Alona wash?
How many plates did Cora
wash?
How many did they wash
in all?
5 plates
3 plates
8 plates

14. alona
count the plates in each set.
5
8
cora
3
=
U

15. We add
5 + 3 = 8.
Let us write this in vertical
form.
5
+3
8
adden
d.
adden
d.
SUM.

16. Another example.
+
=
4 3
7

17. Another example.
+
=
5 2
7

18. Another example.
+
=
6 1
7

19. There is a Pattern when you look at the
ways to find a sum. Below is how to
decompose the number 7 using different
number sentences.
1
2
3
4
5
6
6
5
4
3
2
1
=
=
=
=
=
=
7
7
7
7
7
7
+
+
+
+
+
+
These
numbers
increase by
1.
These
numbers
decrease
by 1.
The SUM is
7 each
time.

20. Another example.
+
=
8 5
13

21. Another example.
+
=
6 7
13

22. EQUIVALENT NUMBER
EXPRESSION
EXAMPLE
S
How many are gray
cubes?
How many are YELLOW
cubes?
How many are the cubes
in all ?
2
5
7
2
+5
7

23. EQUIVALENT NUMBER
EXPRESSION
EXAMPLE
S
How many are gray
cubes?
How many are YELLOW
cubes?
How many are the cubes
in all ?
3
4
7
3
+4
7

24. EQUIVALENT NUMBER
EXPRESSION
EXAMPLE
S
How many are red
hearts?
How many are YELLOW
hearts?
How many are the hearts
in all ?
5
1
6
5
+6
7

25. EQUIVALENT NUMBER
EXPRESSION
EXAMPLE
S
How many are red
hearts?
How many are YELLOW
hearts?
How many are the hearts
in all ?
3
3
6
3
+3
6

26. TRY THIS:
How many are red
STARS?
How many are GREEN
stars?
How many are the stars in
all ?
3
3
6

27. TRY THIS:
How many are red
STARS?
How many are GREEN
stars?
How many are the stars in
all ?
4
2
6

28. Count the number of objects in the
following. Write the addition sentence on
the line
+ = 6
3 3

29. Count the number of objects in the
following. Write the addition sentence on
the line
+ = 13
10 3

30. Job well
done!!

31. Open your book on page 80 – 81 and do
the PRACTICE FOR UNDERSTANDING A
and B.
SEATWORK:

32. ANSWERS:
PRACTICE FOR UNDERSTANDING A and
B.
SEATWORK:
+ = 4
2. 2 2
+ = 4
3. 3 1
+ = 5
4. 3 2

33. B.
SEATWORK ANSWER:
+ = 8
1. 4 4
+ = 4
3. 1 3
+ = 9
2. 5 4

34. Addition
 Is the process of putting things or
numbers together.
 The terms in addition are ADD,
MORE, SUM and INCREASE.
Recap:

35. Open your book on page 82 – 83 and do
the EASY AND AVERAGE A and B
exercises.
SEATWORK:

36. EASY ANSWERS
SEATWORK:
2. 4 + 3 =7 4
+ 3
7
3. 1 + 4 =5 1
+ 4
5

37. EASY ANSWERS
SEATWORK:
4. 6 + 4 =10 6
+ 4
10

38. EASY ANSWERS B.
SEATWORK:
1. 2 + 3 + 1
2. 3 + 2 + 1
3. 2 + 2 + 2

39. AVERAGE
ANSWERS:
SEATWORK:
1. 3
2. 7
3. 7
4. 11
5. 10
6. 10
7. 10
8. 10
9. 8
10.8

40. AVERAGE
ANSWERS:
SEATWORK:
11. 10
12. 7
13. 10
14. 6
15. 9

41. Awesome.
.
Keep
going..