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scrnGC2: Calc Input
scrnGC3: f(x) Plot Input
scrnGC4: g(x) Plot Input
The inputs above will be hidden when the program finally gets launched. Currently, I am not hiding them even when you close the calculator. The purpose of the inputs is to help in debugging. This allows you to enter simple code on the calculator screen but the program translates the input to javascript math. Give it a try and see if you notice any obvious problems or have suggestions for improvements.
Mixed Number Operations Help
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Mixed Number Addition

Mixed number addition is basically a 4 step operation.

  • Convert all fraction parts to a lowest common denominator (LCD).
  • Add the whole number parts of the mixed numbers.
  • Add the fraction parts of the mixed numbers.
  • Check to see if the sum of the fraction parts is an improper fraction.  If so, convert the fraction sum to a mixed number and add it to the whole number sum obtained in the second step.
Example 1:     5 14 +  3 12 =  5 14 +  3 24 =  8 34
Example 2:     7 23 +  2 58 =  7 1624+  2 1524=  9 3124=  9 + 1  7 24=  10   7 24
Mixed Number Subtraction

Mixed number subtraction is also a basic four step operation.

  • Convert all fraction parts to a lowest common denominator (LCD).
  • Check to see if the fraction part you are subtracting from is larger than the fraction part being subtracted.  If so, you will need to borrow one from the whole number.  Remember that the whole number is reduced by one if you have to borrow.
  • Subtract the resulting whole number parts of the mixed numbers.
  • Subtract the resulting fraction parts of the mixed numbers.
Example 3:     6 34 -  2 12 =  6 34 -  2 24 =  4 14
Example 4:     9 23 -  2 34 =  9  8 12-  2  9 12=  8 2012-  2  9 12=  6 3124
Mixed Number Multiplication

Mixed number multiplication is also a basic four step operation.

  • Convert all mixed numbers to improper fractions.
  • Multiply the numerators times each other to find the numerator of the answer.
  • Multiply the denominators times each other to find the denominators of the answer.
  • Convert the answer to a mixed number.  Remember to reduce the fraction to lowest terms.
Example 5:     1 13 ×  3 12 =   43 ×  72 =  286 =  4 46 =  4 23
Mixed Number Division

Mixed number division is like multiplication except that you must invert the improper fraction divisor.

  • Convert all mixed numbers to improper fractions.
  • Invert the divisor.
  • Multiply the numerators times each other to find the numerator of the answer.
  • Multiply the denominators times each other to find the denominators of the answer.
  • Convert the answer to a mixed number.  Remember to reduce the fraction to lowest terms.
Example 6:     4 14 ÷  2 12 =   174 ÷  52 =   174 ×  25 =  3420 =  1 1420 =  1  7 10
© 2002- John Schlecht. All rights reserved.