1.5 |
Rational Numbers |
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Definition |
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A number that can be written in fractional form \(\dfrac{p}{q}\), where \(p\) and \(q\) are integers and \(q\neq0\).
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- Examples: \(-\dfrac{1}{2},\, 7.5,\, 4\)
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Combined basic arithmetic operations of rational numbers: |
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Example |
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Calculate:
\(\begin{aligned} &\space-0.8+\dfrac{3}{4}\times\bigg(-2\dfrac{1}{6}\bigg) \\\\&=-\dfrac{8}{10}+\dfrac{3}{4}\times\bigg(-\dfrac{13}{6}\bigg) \\\\&=-\dfrac{8}{10}+\bigg(-\dfrac{13}{8}\bigg) \\\\&=-\dfrac{64}{80}-\dfrac{130}{80} \\\\&=-\dfrac{194}{80} \\\\&=-2\dfrac{17}{40}. \end{aligned}\)
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