Chocolate Mathematics :Chocolate Mathematics


Chocolate Mathematics is fun…and delicious! :Chocolate Mathematics is fun…and delicious!


Use your OGT calculator for this activity and practice! :Use your OGT calculator for this activity and practice!


Did you know that I can figure out how much you like chocolate?Let’s give it a try! :Did you know that I can figure out how much you like chocolate?Let’s give it a try!


Remember to push the red AC button for “All Clear” on your calculator! You should do this before every problem! :Remember to push the red AC button for “All Clear” on your calculator! You should do this before every problem!


First, pick a number of times a week that you would like to have chocolate. Enter that number on your calculator. :First, pick a number of times a week that you would like to have chocolate. Enter that number on your calculator. You have to choose a number more than 1 BUT less than 10.


Now, let’s pretend that you could eat lots and lots of chocolate and never have to worry about cavities or nutrition!  Take the number you chose and multiply it by 3. :Now, let’s pretend that you could eat lots and lots of chocolate and never have to worry about cavities or nutrition!  Take the number you chose and multiply it by 3. x 3 =


Now, add your original number AND 1 to it: :Now, add your original number AND 1 to it: + __ + 1 = This is the number you chose at the start, when you had to decide how many times you wanted chocolate in a week!


Add 11 to it. :Add 11 to it. + 11 =


Divide it by 4. :Divide it by 4. ∙∙ 4 =


Now subtract 3 from your answer. :Now subtract 3 from your answer. - 3 =


Your answer should be the number of times you wanted chocolate this week! :Your answer should be the number of times you wanted chocolate this week! How did I do??? Did it come out right?


Slide 13:End of part one


Now let’s give you more practice on the calculator – using more of the keys.Here we go… :Now let’s give you more practice on the calculator – using more of the keys.Here we go…


Let’s pretend we had to find the area of this triangle. Remember, the formula for area of a triangle is ½ base x height.Plug in the numbers: ½ (12)(9)Use your calculator. What do you get? :Let’s pretend we had to find the area of this triangle. Remember, the formula for area of a triangle is ½ base x height.Plug in the numbers: ½ (12)(9)Use your calculator. What do you get? 9 in. 12 in.


There are a couple of different ways you could do this on the calculator…A) If you realize that ½ is the same as .5, you might push .5 x 9 x 12 = and you would get 54 in2B) You could also use the fraction key, that looks like this: Using this fraction key, you would push: 1 2 (for ½) x 9 x 12 = and you would get 54 in2 :There are a couple of different ways you could do this on the calculator…A) If you realize that ½ is the same as .5, you might push .5 x 9 x 12 = and you would get 54 in2B) You could also use the fraction key, that looks like this: Using this fraction key, you would push: 1 2 (for ½) x 9 x 12 = and you would get 54 in2


Let’s try another one. Say you had to solve this equation:173 + 94(16) + 74 = Go ahead and try it on your calculator.Don’t forget: the exponent key looks like this: :Let’s try another one. Say you had to solve this equation:173 + 94(16) + 74 = Go ahead and try it on your calculator.Don’t forget: the exponent key looks like this:


173 + 94(16) + 74 = Check your work! Here is one way to solve this equation using the OGT calculator:A) Push: 17 3 + 94 x 16 + 74 =And you should get 6491 :173 + 94(16) + 74 = Check your work! Here is one way to solve this equation using the OGT calculator:A) Push: 17 3 + 94 x 16 + 74 =And you should get 6491


Here’s your next problem to solve:-52 x √121 = ___Use your calculator to find the answer. Check your work on the next page.Don’t forget: To get a square root, you must press the green INV key, then the x2 key.To change the sign of a number, use the ‘change sign’ key that looks like this: :Here’s your next problem to solve:-52 x √121 = ___Use your calculator to find the answer. Check your work on the next page.Don’t forget: To get a square root, you must press the green INV key, then the x2 key.To change the sign of a number, use the ‘change sign’ key that looks like this:


How did you do? Here’s the equation again:-52 x √121 = ___You should have pushed: :How did you do? Here’s the equation again:-52 x √121 = ___You should have pushed: 52 x 121 = -572


You’re doing great! Here’s the last one. Useyour calculator to find the answer. Check your work on the next page.Problem: Find the area of this circle: Remember: The formula for area of a circle is r2. On your calculator, you get  (pi) by pushing the green INV key, then the Exp key. :You’re doing great! Here’s the last one. Useyour calculator to find the answer. Check your work on the next page.Problem: Find the area of this circle: Remember: The formula for area of a circle is r2. On your calculator, you get  (pi) by pushing the green INV key, then the Exp key. r = 3cm


Slide 22:r = 3cm Here’s how you can use the calculator to solve A = r2 Push x 3 = 28.3 cm2


OK, good job! I think you’ve earned yourself some chocolate! :OK, good job! I think you’ve earned yourself some chocolate!