Review of lesson

1. MATH CLASS
GRADE 4

2. PERFORMING
SERIES OF
OPERATIONS

3. MULTIPLY
3 x 10 5 x 7
8 x 8 10 x 10
9 x 6 7 x 8
6 x 5 4 x 9

4. DIVIDE
36 ÷ 9 20 ÷ 4
27 ÷ 3 18 ÷ 8
35 ÷ 5 49 ÷ 7
64 ÷ 8 50 ÷ 5

5. ADD
9 + 9 10 + 6
7+ 8 9 + 8
4 + 7 8 + 5
4 + 4 6 + 8

6. SUBTRACT
10 - 7 9 - 6
20 - 5 19 - 10
14 - 7 11 - 5
12 - 4 16 - 8

7. 4 PICS 1 WORD
Add

8. 4 PICS 1 WORD
Divide

9. 4 PICS 1 WORD
Multiply

10. 4 PICS 1 WORD
Subtract

11. 4 PICS 1 WORD
Subtract

12. 4 PICS 1 WORD
Operations

13. Have you experienced being
absent from school because
you were sick? How did you
feel if you miss the lesson
/test?

14. Tessie was absent because
she was sick. When she went
back to school, she had to
take the test. Items for the
test given are shown below.

15. 2 x 6 ÷ 4 5 x 4 -16 + 8
9 – 7 + 3 18 – 12 ÷ 6 +
7
18 – 12 + 2 16 ÷ 4 x 5 –
7+8

16. ● Do you think Tessie can
answer the test correctly? Why
?
● What do you think will she do?
● If you were her classmate,
what would you do to help her?
● How do you feel if you help
someone?

17. Let’s help Tessie solve
her problem.
2 x 6 ÷ 4 5 x 4 -16 ÷ 8
9 – 7 + 3 18 – 12 ÷ 6 +
7
18 – 12 ÷ 2 16 ÷ 4 x 5 –
7+8

18. Let’s help Tessie solve
her problem.
2 x 6 ÷ 4
=12 ÷ 4
= 3

19. 9 – 7 + 3
= 2 + 3
= 5

20. 18 – 12 ÷ 2
= 18 - 6
= 6

21. 5 x 4 -16 ÷ 8
= 20 – 16 ÷ 8
= 20 – 2
= 22

22. 18 – 12 ÷ 6 + 7
= 18 – 2 + 7
= 16 + 7
= 23

23. 16 ÷ 4 x 5 – 7+8
= 4 x 5 – 7 + 8
= 20 – 7 + 8
= 13 + 8
= 21

24. Did you get the correct
answer?
Why don’t we have the
same answer to some
items?
What are the operations
used in each item?

25. In series of
operations, certain
rules must be
followed to arrive at
one specific

26. The MDAS rule
must be followed
correctly to get the
right answer.

27. The MDAS stands for
the four basic
operations –
Multiplication, Division,
Addition and
Subtraction.

28. Multiply or
divide first in
the order as
they come
from left to
right.
1

29. Add or
subtract in the
order as they
come from left
to right.
2

30. Remember
Do first all Multiplication
or Division before you do
Addition or Subtraction.

31. Let’s solve this
expression.
35 – 6 x
3
35 – 18
17
18-
12÷6+7
18-2+7
16+7
23

32. How do you perform series of
operation?
What is MDAS Rule?

33. Multiply or
divide first in
the order as
they come
from left to
right.
1

34. Add or
subtract in the
order as they
come from left
to right.
2

35. Group Activity
Group 1 : Evaluate the following
expressions.
1. 12 ÷ 3 + 8 = N
2. 84 ÷ 3 x 4 = N
3. 76 – 8 + 5 = N
4. 9 x 9 ÷ 3 – 9 + 6 = N
5. 16 ÷ 4 X 5 – 7 + 8 = N

36. Group Activity
Group 2 : Write the correct symbols
in the box to make the expression
right.
1.60 _____ 42 _____ 14
= 60 _____ 3
= 57
2. 16 _____ 8 ____ 4
= 16 _____ 2
= 8

37. Group Activity
Group 3 : Use the digits 5, 6,7,and 8
to make the expression result to 39.
_____ x _____ - _____ + _____ = 39

38. 1. 4 x 3 + 8
2. 84 ÷ 3 x 4
3. 76 – 8 + 5
4. 7 x 9 ÷ 3 – 7 +
8
5. 6 x 4 + 7 – 8 ÷
2

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That’s all for today kids.
THANK
YOU