Chocolate Mathematics

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Information about Chocolate Mathematics
Education

Published on June 5, 2008

Author: sunnyrain43229

Source: authorstream.com

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!

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