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C2 Numbers & Operations
Mr. Fintelman (FNL)
Friday October 4th
2024
Slide 1 - Diapositive
Date
Friday October 4th 2024
Paragraph
§2.2 The hcf and the lcm
Pages from the handbook
Pag. 61-63
Subject
Prime numbers and factors
The hcf and the lcm
Today is the day...
Slide 2 - Diapositive
I can already…
… give the meaning of the words sum, difference, product and quotient.
… apply the order of operations.
Prior Knowledge
Slide 3 - Diapositive
Arithmetics
Slide 4 - Diapositive
After this lesson, I can…
… calculate the hcf and lcm.
Goals
Slide 5 - Diapositive
Natural numbers - Bit of history
The Ishango Bone, found in Congo and about 20,000 years old, is one of the earliest tools used for counting or mathematical calculation. It features notches that may represent a counting system or lunar calendar.
Slide 6 - Diapositive
Natural numbers - Bit of history
Slide 7 - Diapositive
Natural numbers
Call out a natural number:
Slide 8 - Diapositive
Prime numbers
Slide 9 - Diapositive
Prime factors
Slide 10 - Diapositive
Prime factors
What are the prime factors of...
24=
57=
876=
Slide 11 - Diapositive
Prime factors
What are the prime factors of...
24=2⋅2⋅2⋅3
57=3⋅19
876=2⋅2⋅3⋅73
Slide 12 - Diapositive
Hcf and lcm
Slide 13 - Diapositive
Exercise 17 (Homework)
hcf(36,48)=
lcm(9,15)=
hcf(28,88)=
lcm(18,24)=
Slide 14 - Diapositive
Exercise 17 (Homework)
hcf(36,48)=12
lcm(9,15)=45
hcf(28,88)=4
lcm(18,24)=72
Slide 15 - Diapositive
Worktime
You work neatly by…
… reading the theory (again) before asking a question to your classmate.
… raising a hand before asking a question to the teacher.
… if the teacher is busy, remember your question and move on.