Ma’am Angelica
MATH
O’CLOCK
Deserve Clap
Solve Me!
Solve Me!
What do the symbols
indicate or show?
Who can arrange the
symbols as to which is to
be solved first?
()
-
R ER
PE
F
X
TIO
+
When solving a numerical expression that has more than
one operation, we follow the PMDAS/GMDAS rule. That is,
1. Perform the operation/s inside the parentheses or grouping
first.
ex. (3 + 2) X 4 ÷ 2 =
2. Perform multiplication and division operations in order from
left to right.
ex. 5 X 4 ÷ 2 or 4 ÷ 2 x 3
3. Perform addition and subtraction operations in order from left
to right.
ex. 5 + 3 -1 or 5 – 3 + 1
Look carefully in the given number.
21 + 2 – (3 + 1) ÷ 2
21 + 2 – (3 + 1) ÷ 2
1. What
operation to
perform first?
21 + 2 – (3 + 1)÷ 2
21 + 2 – 4 ÷ 2
1. What
operation to
perform first?

21 + 2 – (3 + 1)÷ 2
 21 + 2 – 4 ÷ 2
 21 + 2 – 2
2. What is the
next operation
to perform?

21 + 2 – (3 + 1)÷ 2
 21 + 2 – 4 ÷ 2
 21 + 2 – 2
 23 – 2
2. What is the
next operation
to perform?

21 + 2 – (3 + 1)÷ 2
 21 + 2 – 4 ÷ 2
 21 + 2 – 2
 23 – 2
 21
3. What is the
answer?
PMDAS
4+5 x (6-2)
4+5 x 4
4+20
24
PMDAS
4+ 10 x (2x4) -16
4+10 x 8 -16
4+ 80 -16
84-16
68
PMDAS
21 + 102  10
21+10010
21 + 10
31
PMDAS
64  (9 x 3-19)
64(27 –19)
64  8
8
PMDAS
3 (9+1) + 6x6
3(10)+6x6
3(10)+36
30+36
66
WHAT’S NEXT!
Ang Galing Galing
Ninyo Clap
STORY TIME!
Lulu comes from
school with a heavy
heart because of
homework. Her elder
brother gives her a
helping hand.
HOMEWORK:
Evaluate the expressions:
a. 12 – 3 + 18 ÷ (6 × 3)
b. 7 × 9 – 3 + 8
c. 18 – (12 ÷ 6) + 7
d. 9 × 9 ÷ 3 – 9 + 6
e. 42 ÷ 4 × (5 – 7) + 8
Do you want to help Lulu and her brother?
Think-PairShare!
Evaluate the expressions:
a. 12 – 3 + 18 ÷ (6 × 3) =
b. 7 × 9 – 3 + 8
=
c. 18 – (12 ÷ 6) + 7
=
d. 9 × 9 ÷ 3 – 9 + 6
=
e. 42 ÷ 4 × (15 – 7) + 8
=
Independent Activity 1
Directions: Fill in the blanks to complete each
solution. The first item is done for you to serve as a
guide.
1.
(12 – 3) + (18 ÷ 6) x 3
(12 – 3) + (18 ÷ 6) x 3
=9+3x3
=9+9
= 18
Let’s Answer!
2. (7 x 9) – 3 + 8
= __ – 3 + 8
= __ + 8
= ___
Let’s Answer!
2. (7 x 9) – 3 + 8
= 63 – 3 + 8
= 60 + 8
= 68
Let’s Answer!
3. 18 – (12 ÷ 6) +7
= 18 – __ + 7
= __ + 7
= ___
Let’s Answer!
3. 18 – (12 ÷ 6) +7
= 18 – 2 + 7
= 16 + 7
= 23
Let’s Answer!
4. 7 – 5 + 8 x (16 ÷ 4)
= 7 – 5 + 8 x __
= 7 – 5 + __
= 2 + __
= ___
Let’s Answer!
4. 7 – 5 + 8 x (16 ÷ 4)
=7–5+8x4
= 7 – 5 + 32
= 2 + 37
= 39
Let’s Answer!
5. (10 x 6) ÷ (9 - 3 + 6)
= 60 ÷ (9 - 3 + 6)
= 60 ÷ (__ + 6)
= 60 ÷ __
= __
Let’s Answer!
5. (10 x 6) ÷ (9 - 3 + 6)
= 60 ÷ (9 - 3 + 6)
= 60 ÷ ( 6 + 6)
= 60 ÷ 12
= 72
Independent Activity 2
Directions: Put ☺if the numerical expression is simplified
correctly and put L if the numerical expression is solved
incorrectly.
Let’s Answer
on the Board!
Let’s Team
Up!
Let’s Team Up!
P/GMDAS RULE (Watermelon
Tune)
Parentheses or Grouping
Multiplication, multiplication
Division, addition, division, addition
Subtraction, subtraction
EVALUATION
Directions: Solve the expressions given applying
PMDAS and GMDAS rules. Encircle the letter of the
correct answer