Texas Instruments TI-80 User Manual - Page 66
Getting Started: Working with Fractions, Fractions - manual
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Getting Started: Working with Fractions Getting Started is a fast-paced introduction. Read the chapter for details. Enter the expression 1 6/27 + 1 1/9. Evaluate the expression, simplify the result, and then use the conversion options on the FRACTION menu to convert the result. This example is performed in MANSIMP (manual simplification) mode. MANSIMP mode is especially useful for students when they are learning fraction concepts. When MANSIMP mode is selected, the úSIMP function (from the FRACTION menu) can be used to simplify fractions step-by-step. 1. Select MANSIMP mode. 2. From the Home screen, press 1 2 ¥ 6 2 _ 27 « 1 2 ¥ 1 2 _ 9 to enter the mixedfraction expression, 1 6/27 + 1 1/9. 3. Press ¸ to evaluate the expression. The ï indicates that the fraction can be simplified. 4. Press J 1 to select úSIMP (simplify). ANSúSIMP is copied to the cursor location. 5. Press ¸ to simplify the fraction. In MANSIMP mode, the TI-80 uses the lowest common factor for simplification. The simplification factor is displayed. The ï preceding the result indicates that the fraction can be simplified further. Continue pressing ¸ until ï is no longer displayed. 3-2 Fractions