For math, my class and I celebrated Pi day on March 14 (3/14= 3.14). First our teacher read a short story, Sir Cumference and the Dragon of Pi, to us. Then we found the diameter, radius, and the circumference of different size circles. Circumference is the distance around the circle. Pi = 3.14, 22/7, or π. The diameter is a straight line passing from side to side through the circle. The radius is a line from the center to the side of the circle. The chord a stright line from side to side, however it never passes the center of the circle. To find the circumference of a circle you have to multiply the diameter and 3.14 or 22/7, but if you have the radius then you multiply the radius by 2 then multiply that by 3.14 or 22/7. If you are asked to give your answer in a fraction then you multiply your diameter by 22/7. If you are asked to give you answer in a decimal then you multipy your diameter by 3.14. Also if your asked to leave pi as π, then you put your diameter first, then π, then your units (example: 12πcm). Then for lunch we had Pi for dessert! 🙂
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Category Archives: Math
T.A.P.S (Talk Aloud Problem Solving): HOT DIGGITY DOG
PROBLEM: I need to cater a party with people who would like to have a simple BBQ with hot dogs. Since I hate having extra hotdogs or buns I need to know what is the better deal? Buying Hebrew National hotdogs which are $3.50 for 7 (package A) or another kosher brand that is $5 for 10 (package B). Hot dogs buns only come in packages of 8 and i need at least 50 hot dogs & buns. Whatever the choice, there should be no extra hotdogs or buns.
PROBLEM TYPE: Is LCM (least common multiple).
WHAT I NEED TO FIND: What is the better deal: $3.50 for 7 buns or $5 for 10 buns. I need to find the LCM for 7 and 10.
GIVEN: The prices of each package and how many buns are in each package.
TRICKS I’LL USE: The trick I will use is LCM for 7 and 10 that is closer to 50
SOLUTION: (for package A)
Step 1: LCM for 7 that is closer to 50 is 49 (7x7=49)
Step 2: I want 7 packages so $3.50×7= $24.50 and if there’s 7 buns in each package then I will get 49 buns total.
SOLUTION: (for package B)
Step 1: LCM for 10 that is closer to 50 is 50 (10x5=50)
Step 2: I want 5 packages so $5.00x5=$25.00 and if there’s 10 bunes in each package then I will get 50 buns total.
ANSWER: Package B of 10 buns for $5
*Math* Category
Math posts go here…
Book of Real Problem Problems (Create your own illustrated math tutorial in Pages or Keynote or with Show Me);
Completed Math Progress Trackers (Saxon, Computer TargetScores, TAPS);
Combined Math-Language Arts Projects (Math Poems or Songs, etc.); Combined Math-Science Projects (SONAR Math Challenges, etc.)