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Summary of Contents for Stokes Publishing MathMaster
- Page 1 Reference Manual for the MathMaster ™ Educational Calculator a product of Stokes Publishing Company Sunnyvale, CA...
- Page 2 Clears decimal fix and all pending operations Toggles sign of dispayed number Percent Square root MathMaster is a registered trademark of Stokes Publishing Company Key Eliminator is a trademark of Stokes Publishing Company ©1995 Stokes Publishing Company • Sunnyvale, California...
- Page 3 MathMaster calculator. You will be using the “world’ s finest four-function calculator,” the only one with the patented feature, the Key Eliminator. To take full advantage of the many features and functions of the...
- Page 4 • Fixing the Number of Decimal Places The decimal point may be fixed to a desig- nated number of places, from 0 to 7. • RESET Pressing the RESET key will reactivate any keys that have been disabled and return the calculator to floating decimal point notation.
- Page 5 The display holds up to eight digits. In addi- tion, there are indicators which will appear in the display to alert you to the status of the various features and functions of the MathMaster. Indicator Description Page Separates large numbers ’...
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Page 6: Key Functions
Key Functions c, Digit keys and = Press c to turn on the calculator. You should have a “0” in the display. To display 12, press 12. Clear the display by pressing c. To display 21, press 21. Clear the display by pressing c. To display 3’287’914, press 3287914. - Page 7 The sum exceeds the display’ s 8- digit capacity. Press c. Display 0. The error has been cleared. Round Off The MathMaster performs precise calcula- tions with a round-off feature. Press 2/3=. The right-most digit is a 7. The rounded-off decimal equivalent for 2/3 is dis- played.
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Page 8: Constant Operations
For 4 x 5 + 3 x 2, press 4x5+3x2=. Display 26. For 4 x (5 + 3 x 2), press 5+3x2=x4=. Display 44. Constant Operations Use the constant feature to repeatedly operate with the same number. Example Press Display Use 4 as a constant. - Page 9 Example Press Display RESET or CE/C 10 x = = = = = 10 [x] Counter 10 x10 10 x 10 x10 1000 10 x10 x10 x10 10000 10 x10 x10 x10 x10 = 100000 Notice that the counter shows the number of times the entered number is used as a factor.
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Page 10: Memory Keys
Memory Keys The three memory keys allow the user to store, add to, subtract from, recall, and clear numbers in memory. Adds displayed number to memory. (memory indicator active) M– Subtracts displayed number from memory. (memory indicator active) MRC Pressed once, recalls memory to dis- play. - Page 11 Press rr2x3=M4x5= Mr. Display 26 Press rr3x7=M2x8= mr. Display 5 Percent Key Press 25%. Display 0.25 (assumes 25% of 1) To find 25% of 60, press 25%x60=. Display 15 To find 60 multiplied by 25%, press 60x25%=. Display 15 Discount and Markup An item that sells for $80 is discounted 25%.
- Page 12 A dress costing $120 is to be marked up an additional 20%. What will be the new price? Press Display 120 [+] The new price for the dress is $144. A VCR selling for $250 is to be discounted 40%. What will the VCR cost including a 6% sales tax? Press Display...
- Page 13 Mr. Palko made a 15% commission on April sales of $12,500 and 24% commission on June sales of $9,250. What was the total of his two-month commissions? Press Display 12500 12500 12500 [x] 0.15 1875 1875 [M] 9250 9250 Press Display 9250 [x] 0.24...
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Page 14: Change Sign Key
Change Sign Key This key finds the opposite or additive inverse of the displayed number. To display the opposite of 5, press 5–. Display -5. To display the opposite of 237, press 237–. Display -237. To display the opposite of 19, press 19–. - Page 15 0.00 will be displayed. Use a two-place mode when working with money. If 8 or 9 is entered following the 3-second interval, the display will return to the floating-decimal point mode. Pressing RESET also returns the display to the floating-decimal point mode. Key Eliminator This new, patented feature allows the user to disable one or more keys by holding...
- Page 16 “25%” is meaningless unless it is known what the whole is. 25% of 40 is 10. 25% of 1,000 is 250, etc. In the MathMaster, the percent key operates in two ways, depending upon whether its use follows an add or subtract operation, or a multiply or divide operation.
- Page 17 3.24 when the equals key is pressed. Changing the Calculator Identification Numbers The MathMaster’ s unique identification sys- tem consists of two number wheels back-to- back inside the back case; one transparent wheel and one opaque wheel. Identification (ID) numbers may be set from 00 to 99.
- Page 18 ID window. A small philips screwdriver is required. Read each step all the way through before accomplishing it. 1. With the MathMaster face down, remove the four screws securing the back case. 2. Remove the back case by lifting and rotat- ing it to the left, and placing it back-side down next to the main case (see figure A).
- Page 19 Note: Be careful not to break the two wires that attach the battery to the circuit board. 3. Locate the ID wheels in the back case and remove the screw from the X-shaped retainer. Lift the retainer free from the alignment holes in the case.
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Page 20: Battery Replacement
Battery Replacement The MathMaster is designed to operate for an average of five years on the factory- installed battery. When the display becomes too dim to read, the battery should be... - Page 21 Battery retainer Lift & rotate back of case gently to left Small screwdriver X-shaped retainer Number wheels Be careful not to pull on the battery wires when case is opened. FIGURE B Front of case 2. Remove the back case by lifting it and rotating it to the left, and placing it back- side down next to the main case.
- Page 22 large post, gently push against the side of the battery until it snaps out of its retainer. Be careful not to break the wires connect- ed to the battery contacts. Lift the old battery out and set it aside. 5. Install the new battery with Plus (+) side up by placing it just to the right of the battery retainer.
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Page 23: One Year Limited Warranty
One Year Limited Warranty The MathMaster calculator is warranted against defects of workmanship and materials for one year from the date of original purchase by the user from Stokes Publishing Company or an authorized SPC dealer. Should the calculator mal-... - Page 24 STOKES PUBLISHING COMPANY 1292 Reamwood Avenue Sunnyvale. CA 94089 Phone (408) 541-9145 • Fax (408) 541-9149 Printed in USA SPC 9/95...
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