Texas Instruments TI-15, Owner'S Manual

Page 1: ...II Problem solving III Fraction 3 3 Basic operations including exponents powers and square root 6 4 Whole numbers and decimals 7 5 Fractions 9 6 Percent 12 7 Constant operations 13 8 Problem solving i...

Page 2: ...at the left hand side of the screen when this is possible f is used to open an expression with brackets and must be used to close before selecting otherwise Syn error is displayed Operations in bracke...

Page 3: ...efaults and clears memory and constants 2 Mode menus See worksheets for further explanations and uses a Calculator mode Press and and to set I Press and choose style for division II Press then and to...

Page 4: ...wn problem eg x 36 and the calculator shows that this has 9 solutions it only counts positive whole numbers and 9 x 4 is different from 4 x 9 Also in MAN mode the place value menu is available See sec...

Page 5: ...5 c Fractions menu Press and to choose then to set See fractions section below...

Page 6: ...the standard one on the screen If this result is used in the next calculation the remainder is dropped c lets you calculate a number to a given power It allows the use of negative exponents see works...

Page 7: ...urn an answer rounded to 1 dec place Pressing gives the full answer 167 832 While the symbol is visible numbers entered will be displayed to the pre set number of decimal places eg if has been used th...

Page 8: ...on The n d indicator in the screen lets you know that the calculator will now give fraction answers to division problems Press to exit the menu Notice that n d is still displayed Now key in 10 5 4 2 9...

Page 9: ...s entered using the button after the whole number part after the numerator and after the denominator followed by or the next part of a calculation c changes a mixed number to an improper fraction and...

Page 10: ...is displayed The calculator uses the decimal value to create the fraction The N D n d indicator at the top of the screen lets you know that the fraction can be simplified further j Simplify by a facto...

Page 11: ...raction The mode settings provide 4 possible display options for computational results displayed in fraction form For example for 6 4 the displays would look like this MANual simp improper n d 6 4 AUT...

Page 12: ...mbers decimals and fractions and with the operators saved b Op1 and Op2 can be used together if required eg If Op1 is 2 and Op2 is x 3 Op1 followed by Op2 will give a different result from Op2 followe...

Page 13: ...s on the screen above accessed using the UP arrow e Hiding the equation i Press Press once The selection 1 is displayed This lets you select to show or hide the expression ii Press to underline Press...

Page 14: ...w key in the correct answer in this case 18 6 12 18 and YES are displayed Then a new problem pops up for you to solve The calculator gives three tries before it gives the right answer and moves to the...

Page 15: ...on subtraction multiplication or division or a in place of the operation symbol so you have to choose the operation Press and to underline the operation you want Press to confirm your selection h Pres...

Page 16: ...ions to the problem Note that the calculator will only use positive integers and will count 1 23 as different from 23 1 The process is not algebraic either as the can represent different whole numbers...

Page 17: ...on AUTO MAN 3 Press to underline MAN Press to confirm your selection 4 Press or to exit the menu and return to Problem Solving The indicator is displayed but not the Auto indicator You are still in Pr...

Page 18: ...ny when used with the red keys The WHITE keys operate the same way for either selection Press the red key 7 8 _ _ _ _ _ is displayed There are 78 hundreds in the number Press the red key 7 8 9 6 4 _ _...

Page 19: ...can be stored 2 Using memory This will store the screen value to the memory It does not store until has been pressed Adds a value to what is stored Subtracts displayed value from memory Multiplies st...

Page 20: ...20 13 Display Indicators...