Chocolate Mathematics

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Presentation Description

Chocolate Mathematics using the calculator.

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gr8 yummy

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Presentation Transcript

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!