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Gene!

This program first appeared in the V6N5P12 PPC Journal in August 1979 by John Dearing. Thanks to John wherever he is today!

This program is designed to be used in teaching children the four operations of arithmetic. Problems are displayed with one number to the left of the decimal and the other number to the right. Example: 8 and 2 are displayed as 8.02. The user then decides which operation to perform, keys in his/her answer and reinitiates the program. Although all numbers in the problems are positive, some results of the subtractions will be negative.

**User Instructions:**

1) Key in program

2) Store seed (0 < seed < 1) STO 1

3) Store maximum number to be used: STO 2

4) Press GSB 0 - problem is displayed in the form of XX.YY

5) Choose an operation and input your answer:

For addition, input your answer and press GSB 1.

For subtraction, input your answer and press GSB 2.

For multiplication, input your answer and press GSB 3.

For division, input your answer and press GSB 4.

6) If you are correct, the next problem is displayed.

7) If you are incorrect, the problem will be shown again but will have a negative sign in the Display.

8) If you get an error (division by zero), press the CLX key and go to step 4.

Line Instruction 01 LBL 0 02 FIX 2 03 GSB 9 04 STO 4 05 GSB 9 06 STO 3 07 RCL 4 08 EEX 09 2 10 / 11 + 12 STO 5 13 R/S 14 LBL 9 15 RCL 1 16 PI 17 X^2 18 * 19 FRC 20 STO 1 21 RCL 2 22 1 23 + 24 * 25 INT 26 RTN 27 LBL 1 28 RCL 3 29 RCL 4 30 + 31 GTO 8 32 LBL 2 33 RCL 3 34 RCL 4 35 - 36 GTO 8 37 LBL 3 38 RCL 3 39 RCL 4 40 * 41 GTO 8 42 LBL 4 43 RCL 3 44 RCL 4 45 / 46 LBL 8 47 X = Y? 48 GTO 0 49 RCL 5 50 CHS 51 R/SThat's all there is to it. Enjoy!