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Basic Math/subtracting fractions
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Question
can you help to teach me to subtract a fraction on my homework, or just to refresh my memory of it,
thanks, callen
p.s. heres the fraction, 5 - (2/3times3/7) =?
please help,(got a test on it on monday, thanks again bye)
Hi Callen,
5-(2/3)*(3/7)
=5-(2*3)/(3*7) ...cancel out common factor, the 3 that is.
=5-(2/7) ...then, put everything over a common denominator
The idea is to express 5 as x/7.
we do this by multiplying 5 by 7/7.
you get 5 equivalent to (5*7)/7 OR 35/7
So, the last line
=(35/7)-(2/7)
=(35-2)/7
=33/7
Cheers.
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Answers by Expert:
Josh
Expertise
When I work through problems, I like to emphasize concepts which I believe are worth noting. I will try to answer questions in the following areas, but not at the advanced level. Algebra. Sequences & Series. Trigonometry. Functions & Graphs. Coordinate Geometry. Quadratic Polynomials. Exponential & Logarithms. Basic Calculus. Probability, Permutation and Combination. Mathematical Induction. Complex numbers. Physics problems.
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I have worked as a teaching assistant in college. My hope is that more people will share knowledge without boundary, give help without seeking recognition or monetary rewards.
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Bachelor degree in Engineering Science
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