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gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Warm Up Grade 8
Tuesday, Nov. 8
Quiz Tomorrow
Use product of perfect squares to find the square root of the following:
(a) 5184
(b) 5929
(c) 7056
Perfect Squares
1 4
9 16
25 36
49 64
81 100
121 144
169 196
225 gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Warm Up Grade 8
solutions
Use product of perfect squares to find the square root of the following:
(a) 5184
(b) 5929
(c) 7056
(d) 1089
a)
(e) 576
(f) 11 025
Perfect Squares
1 4
9 16
25 36
49 64
81 100
121 144
169 196
225 gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Homework Solutions
Homework pg. 16 # 12 ­15
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Homework Solutions
Perfect Squares
1
81
4
100
9
121
16 144
25 169
36 196
49 225
64
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
Homework pg. 16 # 16­ 19
Homework Solutions
November 08, 2016
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Prime numbers are numbers that are only divisible by 1 and itself
2, 3, 5, 7, 11, 13, 17, 19, 23, 29,...
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
November 08, 2016
Finding the square root using prime factorization
To find the square root of number using prime factorization, you first have to write the number as a product of prime numbers. You can use a factor tree to write a number as a product of prime numbers.
Step 1) Find the prime Factors of 400
ONLY prime numbers in tree
400
Perfect Squares
1 4
9 16
25 36
49 64
81 100
121 144
169 196
225 put in pairs
Step 2) Find the square root by putting the factors in pairs, under a √ ,
then calculate.
√ 400 = √(2x2)x(2x2)x(5x5)
√ 400 = √(2x2)x √(2x2)x √(5x5)
pairs
separate
calculate the √ of each pair remember the √ 400 = 2 x 2 x 5 = 20
√ 2x2 = √4 = 2
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
Now find the 324, using each method below: (a)product of perfect squares (b)prime factorization
(c) Factors
a) product of perfect squares b) prime factorization
c) Factors
November 08, 2016
Solutions
Perfect Squares
1 4
9 16
25 36
49 64
81 100
121 144
169 196
225 gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
Prime Numbers:
2,3,5,7,11,13,17,19,23,29,31,...
Perfect squares:
November 08, 2016
similar to Quiz Tomorrow
1,4,9,16,25,36,49,64,81,100,121,144,169,196,225
1) Use product of perfect squares to find the square root of the following:
(a) 1296
2) Use product of PRIMES to find the square root of the following: (Factor Tree)
(a) 2304
3) Square 25 (SHOW WORK YOU DO ON CALCULATOR)
4) Find the square root of 256 (SHOW WORK YOU DO ON CALCULATOR)
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
Quiz Tomorrow
Homework (Grade 8)
(d) 1089
(e) 576 (
f) 11 025
need more
November 08, 2016
gr 8 u1 sqre day 7 prime factorization (M. O'Keefe ).notebook
Homework (Grade 8)
Gr. 8
November 08, 2016
you try
more practice
1. Use the product of perfect squares to find the following square roots:
(a) 5929
(b) 576
(c) 7056
2. Find the square root of the following, using prime factorizaion:
(a) 1444
(b) 784
(c) 2025
(d) 2304
Prime Numbers:
2,3,5,7,11,13,17,19,23,29,31,...
Perfect squares:
1,4,9,16,25,36,49,64,81,100,121,144,169,196,225
Attachments
Grade 8 Math Homework Oct. 29, 2014.docx
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