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Class:4: Lesson#21

1) The document discusses prime factorization, reviewing the concept using a factor tree to break down 57 into 3 × 19. 2) Students are asked to revise prime factorization using factor trees and complete a worksheet practicing this skill. 3) As an activity, students must solve math questions involving prime factorization in their diary on neat copy paper.

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Usman Aslam
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87 views8 pages

Class:4: Lesson#21

1) The document discusses prime factorization, reviewing the concept using a factor tree to break down 57 into 3 × 19. 2) Students are asked to revise prime factorization using factor trees and complete a worksheet practicing this skill. 3) As an activity, students must solve math questions involving prime factorization in their diary on neat copy paper.

Uploaded by

Usman Aslam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Phase2 Week 6

Class:4
Lesson#21

Tuesday 𝟕𝑡ℎ July 2020

Unit 2: Factors & Multiples


Lesson code: (4M21)
Topic:
Prime factorization
(Practice worksheet)
Revise the concept of prime
factorization by factor
tree& do today’s diary on
neat copy
RECAP Factor Tree

57

Even/odd Divisibility Rule for 3
Sum of digits = 5+7=12

prime/composite 12 ÷ 3=4 r 0

3 ×
prime 19
19 Both factors are prime. 57
-3
27
Factorization is complete. - 27
0

Prime factorization of 57 = 3 × 19
RECAP
Diary : Solve the given question(all parts) on neat copy:

.(Q#1 is already done) p

× × ×
× × ×

× × ×
99
× × ×

× × ×

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