TTrix
Software Design

Using MAcalc Pro

Special keys

  • Press and hold the Del key for 1 second to "clear X"

  • Press and hold the Rcl key for 1 second to view all storage registers

  • Press Fn to change the function set

  • To change mode press Mode

  • Moving the iPhone/iPod to a horiozontal position with the screen facing down erases all calculator registers.

  • To switch from Interger to Floating point and vice-versa, "swipe" the calculator display area or use the Mode key.

  • Tap the display area for clipboard copy.

  • In RPN mode, double tap the display area to view the stack registers.

Simple Arithmetic


To calculate 13 + 2 do:
  • RPN:
  •      13 Enter 2 +
  • Algebraic:
  •      13 + 2 =
To calculate 2 / ( 5 - 1 ) do:
  • RPN:
  •      2 Enter 5 Enter 1 - +

  • Algebraic:
  •      2 ÷ ( 5 - 1 ) =

Combination and Permutaion


Combination of 16 items in groups of 3: (result = 560)
  • RPN:
  •      16 Enter 3 Cy,x
  • Algebraic:
  •      16 Cy,x 3 =

Permutation of 16 items in groups of 3: (result = 3360)
  • RPN:
  •      16 Enter 3 Py,x
  • Algebraic:
  •      16 Py,x 3 =


Time Value of Money

You have payed-up $5,000 for an insurance policy that pays 5.35% compounded annually. What is the future value in 14 years? (result = $10,371.79)

Cfin (clear financial registers)
14 Sto n
5.35 Sto i
5000 +/- Sto PV
FV (compute future value)

Instead of entering n, i and PV using calculator keys, their values could have been entered using the Edit key.


You got a $35,000 loan at 10.5% interest. Paying $325 every month, how many payments are required to pay off the loan? (result = 328 payments)

Cfin (clear financial registers)
10.5 12÷ (divide by 12 and store in i register)
35000 Sto PV
325 +/- Sto PMT
n (compute number of payments)


Cash Flow

You bought a house for $80,000, kept it for 5 years and sold for $ 130,000. Assumming a return of 13% and the following cash flow: -80000, -500, 4500, 5500, 4500, 130000, compute NPV (result = 212.18)

Cfin (clear financial registers)
80000 +/- CFo
500 +/- CFj
4500 CFj
5500 CFj
4500 CFj
130000 CFj
13 i
NPV (compute NPV)

Instead of entering i and CF values using calculator keys, thy could have been entered using the Edit key.


Percentage

The electricity bill fell from $58.50 to $53.25. What is the percentage change? (result = -8.97)

  • RPN:
  •      58.5 Enter 53.25 Δ%

  • Algebraic:
  •      58.5 Δ% 53.25 =

A company posted sales of $2.36 million in Asia bringing the worldwide total to $7.95 million. What percentage of the total sales ocurred in Asia? (result = 29.69)

  • RPN:
  •      7.95 Enter 2.36 %T

  • Algebraic:
  •      7.95 %T 2.36 =


Statistics

Calculate mean hours and sales for the following table: (result = 40.00 and 21,714.29)

Calculate standard deviation (result = 4,820.59 and 6.03)

PersonHoursSales
132$17000
240$25000
345$26000
440$20000
538$21000
650$28000
735$15000

 
  • RPN:
  •      C Σ (clear statistics registers)
              32 Enter 17000 Σ +
              40 Enter 25000 Σ +
              45 Enter 26000 Σ +
              40 Enter 20000 Σ +
              38 Enter 21000 Σ +
              50 Enter 28000 Σ +
              35 Enter 15000 Σ +
         μ (compute mean)
         σ (compute standard deviation)

  • Algebraic:
  •          Instead of "Enter"
              35 Enter 15000 Σ +
             Use "+"
              35 + 15000 Σ +


Dates

Today:

  • RPN:
  •      0 Enter 0 Date

  • Algebraic:
  •      0 Date 0 =

Date + days:

  • RPN:
  •      20090115 Enter 5 Date

  • Algebraic:
  •      20090115 Date 5 =

Days between dates:

  • RPN:
  •      20090115 Enter 20090110 Δdys

  • Algebraic:
  •      20090115 Δdys 20090110 =


Using storage registers

MAcalc Pro has 100 storage registers (00 through 99).
Note: MAcalc Pro can be configured to work with 10 storage registers. In that case registers will be accessed with a single digit (0 through 9).

  • Press and hold the Rcl key for 1 second to view all storage registers

  • Storing number 25 in register 12:
  •      25 Sto 12
  • Recalling register 12:
  •      Rcl 12