21st Century Demo Teaching

Welcome to
Grade 5 Math Class

Reymund C. Lozano
Teacher

Poll

How are you feeling today?

• HAPPY

• NERVOUS

• SAD

• EXCITED

ORDER OF OPERATIONS

OBJECTIVES: At the end of the 20 - minute lesson, students are expected to perform operations on whole numbers applying Parenthesis, Multiplication, Division, Addition, Subtraction (PMDAS) or Grouping, Multiplication, Division, Addition, Subtraction (GMDAS) correctly.

Short Math - Drill

Multiple Choice

35 + 43

• 78

• 68

• 58

• 48

Multiple Choice

768 - 145

• 323

• 423

• 523

• 623

Multiple Choice

12 x 7

• 64

• 74

• 84

• 94

Multiple Choice

45 ÷ 3

• 10

• 15

• 20

• 25

Match

Match the mathematics symbol related to its terms or words

• +

• -

• x

• ÷

increased by, combined, more than,sum

diminished by, less than, subtract

twice, thrice, of,product

split into, cut, average,quotient

• increased by, combined, more than,sum

• diminished by, less than, subtract

• twice, thrice, of,product

• split into, cut, average,quotient

PROBLEM OPENER:

What is the result if you subtract the sum of 123 and 17 from the product of 19 and 8?

ANOTHER EXAMPLE

44 x (9 ÷3) - 81 + 45 = ____

Today we learn PMDAS (2x)
Parenthesis
Multiplication
Division
Addition
Subtraction
Whichever comes from left to right

GENERALIZATION: Let's sing the MDAS song to the tune of "THE FARM IN THE DELL"

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Choose the emoji that reflects your understanding of today's lesson

• Got it!

• I'm confused!

• Did Not Understand!

• OTHERS...

Multiple Choice

QUIZ: Perform operations on whole numbers applying PMDAS/GMDAS.

Item #1: (14 ÷ 2) – 3 + 2 × 2 = N

• 8
• 5
• 10
• 12

Multiple Choice

QUIZ: Perform operations on whole numbers applying PMDAS/GMDAS.

Item #2: 9 – 3 + 6 ÷ 2 x 3 = N

• 12
• 18
• 21
• 15

Multiple Choice

QUIZ: Perform operations on whole numbers applying PMDAS/GMDAS.

Item #3:    63 ÷ 7 + 2 – 6 = N

• 5
• 3
• 10
• 7

Multiple Choice

QUIZ: Perform operations on whole numbers applying PMDAS/GMDAS.

Item # 4:    37 + (3 × 2) ÷ 6 = N

• 38
• 34
• 40
• 36

Multiple Choice

QUIZ: Perform operations on whole numbers applying PMDAS/GMDAS.

Item #5: (4 x 3) + 50 ÷ 2 = N

• 37
• 60
• 45
• 25

Assignment
Perform operations on whole numbers applying PMDAS/GMDAS.
https://quizizz.com/join?gc=396719

Thank you!