itbpF50.75pt21.75pt6ptex3.wmfCheck the equality ${\frac{{9}}{{8}}}$ - ${\frac{{8}}{{9}}}$ = $\left\vert\vphantom{ \frac{9}{8}-\frac{8}{9}% }\right.$${\frac{{9}}{{8}}}$ - ${\frac{{8}}{{9}% }}$$\left.\vphantom{ \frac{9}{8}-\frac{8}{9}% }\right\vert$

  1. ClickitbpF19.5625pt18.8125pt2ptfraction.wmfor, from the Insert menu, choose Fraction. Type 9, press Tab, type 8, and press spacebar.

  2. Type - , clickitbpF19.5625pt18.8125pt2ptfraction.wmf, type 8, press Tab, type 9, and press spacebar.

  3. Type = , clickitbpF22.4375pt21.0625pt2ptbrackets1.wmf, chooseitbpF19.5625pt33.125pt2ptFigure , and choose OK.

  4. Type the two fractions again.

  5. From the Maple menu, choose Check Equality. On your screen, you see this result: ${\dfrac{{9}}{{8}}}$ - ${\dfrac{{8}}{{9}}}$ = $\left\vert\vphantom{ \dfrac{9}{8}-\dfrac{8}{9}% }\right.$${\dfrac{{9}}{{8}}}$ - ${\dfrac{{8}}{{9}% }}$$\left.\vphantom{ \dfrac{9}{8}-\dfrac{8}{9}% }\right\vert$ is true.