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Фрагмент инструкции
It operates in well-lit areas using solar cell, and it operates in other light settings on battery. Examples: See the Examples page for representative problems and keystroke sequences that demonstrate many of the TI-15’s functions and capabilities. Before starting each problem set, reset the calculator by pressing and . simultaneously to help ensure that your displays are the same as those shown in the examples. In Problem Solving Auto mode, however, displays will vary from those shown, because these problems are random. Basic Operations To turn the TI-15 on, press . If the calculator is on, press to turn it off. APD™ (Automatic Power Down™) turns off the TI-15 automatically if no key is pressed for about 5 minutes. Press after APD to power up again; the display, pending operations, settings, and memory are retained. Display and Scrolling " ! # $ The TI-15 has a two-line display; each line has room for 11 characters. Entries that do not fit on the first line wrap to the second, and then scroll when the second line is filled. Exception: When computing fractions, the TI-15 displays only one line, which scrolls when a problem exceeds the capacity of the line. Entries can be up to 88 characters. Exceptions: In Stored Operations, the limit is 44 characters. In . Man mode, entries do not wrap; entries cannot exceed 11 characters. When a result exceeds the capacity of the screen, it is displayed in scientific notation. However, if the result is greater than 10^99 or less than 10^L99, you will get an overflow error or underflow error, respectively. Scroll with ", !, #, and $. ¦ Press " and ! to scroll through entries or to move the underscore within a menu list. ¦ Press # and $ to scroll through history or, within a menu, to move to the next level of menu lists. Clearing, Correcting and Resetting . w w Deletes the character to the left of the cursor. In fractions, clears from right bottom to left top. . Clears display and error condition. (Does not clear value from memory.) || Clears value from memory. To reset, hold down and . simultaneously for a few seconds and release. MEM CLEARED displays. This completely clears the calculator and restores all default settings. You can also reset using the Mode menu (see below). and . Mode Setting Menus . . . . When you divide a positive whole number by a positive whole number with ., the result is displayed in the form Q r R, where Q is the quotient and R is the remainder. If you use the result of integer division in a subsequent calculation, the TI-15 uses only the quotient; the remainder is dropped. Fractions . . . . ¦ ¤ § . Press . after entering a number to designate the numerator of a fraction. Press . after entering a number to designate the denominator of a fraction. Both numerator and denominator must be integers. If you enter a denominator greater than 1000, or if a calculation yields a denominator greater than 1000, the TI-15 displays results in decimal format. You can input either the numerator or the denominator first. . separates the whole number from the fraction in a mixed number. . displays a menu that lets you specify how fraction results are displayed. ¦ U n/d (default) displays results as mixed numbers. ¦ n/d displays results as simple (improper) fractions. .$ displays a menu that lets you specify the simplification method. ¦ Man (default) requires manual simplification of fractions. ¦ Auto automatically reduces fraction results to lowest terms. N/D"n/d indicates that fraction results can be simplified. ¤ enables you to simplify a fraction manually. § displays the factor that was used to simplify a fraction in your last manual simplification step. Press § again to restore the fraction to the screen. ¦ converts a mixed number to an improper fraction or an improper fraction to a mixed number. . converts a fraction to a decimal, or converts a decimal to a fraction, if possible. If a problem contains both fractions and decimals, the results are displayed in decimal format. However, if you press . and select n/d, the results of division will be displayed in fraction format, when possible. Percents . y Press . after a entering a value to calculate a percent. Press y to convert a decimal or a fraction to a percent. Roots and Powers ¬ lets you obtain the square root of a number. After entering the number, be sure to close the parentheses. . raises a number to the power you specify. Pi © © enters the value of p, which is stored internally to 13 digits (3.141592653590). In some cases, results display with symbolic p, and in other cases as a numeric value. Memory z | After a calculation, press z® to store the displayed result in memory. If memory already contains a value, the new one will replace it. When memory contains a value other than 0, M displays on the screen. To recall the value from memory for use in a calculation, press | once. To clear memory, press ||. Indicator . . Fix 4M M Op1, Op2 Auto I n P d Nn " Dd .» !" Key . .$ .$$ .$$$ . .$ .. ..$ ..$$...