THINK & DISCUSS
1. Hasith said "5/3+2/7 = 7/10". Do you agree with him?
2. How can you find the value of 5√2-√8?
Answers
Given : Hasith said "5/3+2/7 = 7/10"
To Find : Do you agree with him?
Solution:
"5/3+2/7 = 7/10"
He added two Fraction , numerator repeatedly & denominator separately
which is wrong
only Numerators can be added directly when denominator is common
Hence
5/3 + 2/7
to have common denominator
take LCM of 3 & 7 = 21
Hence write each term as denominator 21
5/3 = 35/21
2/7 = 6/21
35/21 + 6/21
as denominator is common bow add numerators only
(35 + 6)/21
= 41/21
5/3 + 2/7 = 41/21 ≠ 7/10
41 /21 = 410/210
7/10 = 147/210
410 ≠ 147
5√2-√8
√8 = √(2 * 2 * 2) = 2√2
= 5√2- 2√2
= 3√2
using √2= 1.414
= 3 ( 1.414)
= 4.242
5√2-√8 = 4.242
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Answer:
is I agree with hasitth
5/3+2/7 = 7/10".