From Förberedande kurs i matematik 1

Revision as of 09:47, 26 March 2008 (edit) Lina (Talk | contribs) (Ny sida: {{NAVCONTENT_START}} <center> Bild:1_2_1a.gif </center> {{NAVCONTENT_STOP}}) ← Previous diff		Current revision (07:30, 19 September 2008) (edit) (undo) Tek (Talk | contribs) m
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-	{{NAVCONTENT_START}}	+	In order for fractions to be added together, they need first to be rewritten so that they have the same denominator, and we do this by multiplying the numerator and denominator of each fraction by the denominator of the other fraction. So,
-	<center> [[Bild:1_2_1a.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+	{{Displayed math||<math>\frac{7\cdot 7}{4\cdot 7}+\frac{11\cdot 4}{7\cdot 4}=\frac{49}{28}+\frac{44}{28}\,</math>.}}
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		+	Now, the numerators can be added together,
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		+	{{Displayed math||<math>\frac{49}{28}+\frac{44}{28}=\frac{49+44}{28}=\frac{93}{28}\,</math>.}}

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Current revision

In order for fractions to be added together, they need first to be rewritten so that they have the same denominator, and we do this by multiplying the numerator and denominator of each fraction by the denominator of the other fraction. So,

\displaystyle \frac{7\cdot 7}{4\cdot 7}+\frac{11\cdot 4}{7\cdot 4}=\frac{49}{28}+\frac{44}{28}\,.

Now, the numerators can be added together,

\displaystyle \frac{49}{28}+\frac{44}{28}=\frac{49+44}{28}=\frac{93}{28}\,.