Monday, March 11, 2013

Saving $$$

Team up with one other student and share your thinking as you work towards solving this problem.

31 comments:

  1. Mary L and I think that the answer is 9!

    We think it is because the bike cost 140 dollars and he has already saved $68. We made 68 a tidy ten which was 70. 7+7=14 so 70 plus 70 is 140. We added the 2 from the tidy ten to 70 which makes 72. He saved for 8 months so 8x something = 72 and the answer is 9.

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    1. Great work girls, it was quite easy to follow your thinking. Did you do all of the work in your head, or did you use some paper and pencil too?

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  2. Dillon, Samuela, Serena and I does 140 - 68 equals 72 and 9 times 8 equals 72 witch we think its 9 months.

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    1. What were the strategies that you used? How do you know that 140 - 68 = 72?

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  3. Lave, Ioritana and Niuma thinks the answer 8 dollars for 5 months and that equals 40.So 68 divide by 8 equals 140.

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    1. Please explain your thinking as you worked out 68 divided by 8 to get 140.

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  4. kayden and evan think it is 8 mouths

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    1. Thanks for your effort boys! Can you tell me why you think it is 8 months? Remember, it is our thinking that we are trying to share, even more than an answer.

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  5. Alexandria and ElevaMarch 12, 2013 at 3:03 PM

    Eleva and Alexandria

    First we timed 8 with how many mouths there are.Which is 12, so 8x12 = 96. Then we tried adding 96 to 68 ( 68 is how much money he has already saved).The answer that we got all up is 164.The bike that he wanted to buy cost $140 so he would have more than enough at the end of the year.

    12 mouths is $96
    The mouths that will take him to finish is 9 he will have 72 dollars.

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    1. Months girls, not MOUTHS! lol Mouths aside, I like the way you looked at it for the entire year, and yes I agree that he will have enough by the end of the year. How did you decide that he needed $72?

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  6. Jessica,Grace and PorschaMarch 14, 2013 at 12:22 PM

    Jessica Grace and Porscha,


    Timmy wants to buy a bike that cost $140. Timmy has already saved 68 dollars. He plans to save $8.00 dollars a month. The question says how many month does Timmy have to save enough to buy the bike? 8x9=72, 72+68= 140 so our answer is 9 months.

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    1. First Me and Jessica did 8x8=64, 64+68=132. But that wasn't the answer so we did 8x9=72, 72+68= 140. So thats how we got 72

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  7. Porscha and Mya

    So we think that he saved $72 in 8 months. so 68 + 72 = 140.

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    1. What were your strategies? How did you come up with your figures?

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    2. The text ask's how many months did it take for him to save up just enough to buy the bike.
      So we know that $68 + $72 = $140
      And our answer is 8 months

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  8. This comment has been removed by the author.

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  9. Antonio & Jacob,


    We think that in eight months Timmy will have 80 dollars + the 68 dollars he already saved. with the left over money he can buy a bike pump.

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    1. How do you know that he will have $80 in eight months? Does he have left over cash?

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  10. Me and Isiah,

    thinks it is 8 dollars for 5 months and that equals 40.So 68 divide by 8 equals 140.

    we our fingers

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    1. 68 divided by 8 equals 8.5. You might wish to recalculate even though I do agree with 8 dollars for 5 months does equal $40.

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  11. Sarona and I
    Think that if he waits 8 more months then he will have saved $72 dollars then if you put $68 dollars with the $72 dollars then he will get $140 dollars

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    1. How do you know that 68 and 72 equals 140?

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    2. Explain how you calculated that he will have $72 in 8 months.

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  12. Cheyanne, Faaao, and I have decided that the answer is 9 months. What we done is started off from $68 because Timmy had $68. First we knew we had to add $8 to every month that we pass, so we just kept on adding $8 until we got up to $140, and ended up passing 9 months.

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    1. It sounds like you did some repeated addition. Can you think of another strategy that might work too? Check out some of the responses above/below.

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  13. Hi Mr Barks we have been thinking of the answer was.


    That Timmy has to save up to 8 months to buy a bike for him self. in the 8 months he would've got 72 dollars.

    from Texas and Ben

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    1. Can you explain to me how you discovered that he would have $72 after 8 months? What was your strategy and thinking?

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  14. sapphire and i thinks its 9 months because 8x9=72 so 72+68=140. so we think its 9 months.

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