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-1 1/2 - (+3 1/2) - (-5/8)

User Yadhu
by
7.5k points

2 Answers

5 votes

Answer:


\boldsymbol{-(35)/(8)}

or, in decimal
-4.375

Explanation:


\textrm{The expression is }\rm -1(1)/(2)-\left(+3(1)/(2)\right)-\left(-5/8\right)


\mathrm{Convert\:mixed\:numbers\:to\:improper\:fractions}:\\-1(1)/(2) = -(1\cdot 2+1)/(2) = -(3)/(2)\\\\\\+3(1)/(2) = +(3\cdot 2+1)/(2) = +(7)/(2) = (7)/(2)


\textrm{The expression is }\rm -1(1)/(2)-\left(+3(1)/(2)\right)-\left(-5/8\right)\\= -(3)/(2)-\left((7)/(2)\right)-(-5)/(8)\\\\\\= -(3)/(2)-(7)/(2)\right)+(5)/(8)\\\\\\

The LCM of 2 and 8 is 8

Multiply each term by 8 and divide the result by 8

We get for numerator:

8\cdot(-3)/(2) - 8\cdot (7)/(2) + 8\cdot (5)/(8)\\\\= -12 - 28 + 5 = -35\\

Denominator is 8

So answer is

\boldsymbol{-(35)/(8)}

In decimal that would be -4.375

Choose whichever form you like

User HungryArthur
by
8.0k points
6 votes

Answer:

−3.375

Explanation:

Hope this helps :)

User Jeremy Goodell
by
8.5k points

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