Wednesday, February 1, 2017

Calculator Talks! Secret Code

Calculator Skills 02: Calculator Talks!


Let's key the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 into the calculator. Look at what's displayed on the 
calculator output screen. Turn the calculator upside-down. 

Do they look like any letters in the alphabet?

For example: 
The digit 0 becomes O, 1 becomes I, 2 becomes Z, 3 becomes E, 4 becomes h, 5 becomes S, 
6 becomes g, 7 becomes L, 8 becomes B, and 9 becomes G.

 Let's try the following:
  • enter 6.2
  • multiply this by itself
  • add 0.23
  • divide by 50
Turn the calculator upside down, and you have a friendly greeting

Let's see what we have for breakfast:
  • multiply this by 1000
  • divide the result by 6
  • throw away the part to the right of the decimal (what is the TECHNICAL term for this???)
  • subtract 3 from the result. Mmm! Delicious! 
  • But be sure to throw the ( 68 x 68 - 7 ) x 5 x 5 x 5 + 220 in the trash!
Let's see if you could figure out the secret code below :)
  • Does the ( 19 + 19 - 1 ) x 19 + 2 x 3 x 5 have (47 x 47 + 10 x 10 ) x 5 x 5 - 3 x 3 
         or (47 x 10 + 47 x 10 + 47 x 10 + 47 x 10 - 1) x 3 ? or lay 7 x (800 + 9)?
  • Is there one in your neighbourhood 1 / 50 ?
  • What about the 2 x 13 x 13 ?
  • Or the 3 x 3 x 3 x 3 x 101 - 3000?
  • The (50 x 50 x 3 + 1) x 6 - (50 x 50 x 4)?

(Of course, the plural of (50 x 50 x 3 + 1) x 6 - (50 x 50 x 4) is (8 - 1) x 8 x ( 8 x ( 8 x (8 + 1 + 1) - 1 ) - 1 ), isn't it.)



Now, create a secret code that and post it in the Padlet!

Each unique expression resulting in word will worth...

  • Expressions involving +, -, x, ÷ will gain the 3 points
  • Expressions involving squares, cubes and roots will gain 1 bonus point (on top of 3 points)
  • Expressions phrase made up of 3 or more words will gain 10 points
Remember to add your name and group number to the title of the post.




Made with Padlet

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