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Problem Using 20 cubes, make four piles so that the first pile contains 4 more cubes than the second pile, the second pile contains 1 cube less than the.

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Presentation on theme: "Problem Using 20 cubes, make four piles so that the first pile contains 4 more cubes than the second pile, the second pile contains 1 cube less than the."— Presentation transcript:

1 Problem Using 20 cubes, make four piles so that the first pile contains 4 more cubes than the second pile, the second pile contains 1 cube less than the third pile, and the fourth pile contains twice as many cubes as the second pile. How many cubes are in each pile?

2 CLARIFY To make clear, to remove misconceptions.
You must answer the following questions to show an understanding of the problem. What am I told? What am I trying to find out? Can I say it in my own words?

3 What am I trying to find out? Can I say it in my own words?
Using 20 cubes, make four piles so that the first pile contains 4 more cubes than the second pile, the second pile contains 1 cube less than the third pile, and the fourth pile contains twice as many cubes as the second pile. How many cubes are in each pile? What am I told? What am I trying to find out? Can I say it in my own words? Solve the problem. What strategy is best?

4 What am I told? 20 cubes 4 piles First pile, 4 more than second
Second pile, one less than third Fourth has twice as many as second

5 What am I trying to find out?
How many cubes are in each pile so that the total number of cubes used is 20.

6 Solve the problem Pile 1 Pile 2 Pile 3 Pile 4 Total 1 2 3 4 5 6 7 8
Strategy: Guess, Check and Refine Pile 1 Pile 2 Pile 3 Pile 4 Total 1 2 3 4 5 6 7 8 -3 - - - - - - - - - - - 1 5 1 2 2 10 2 3 4 15 3 4 6 20 Write your answer in a sentence

7 Write your answer in a sentence
If I use 20 blocks, the first pile has 7 blocks, the second pile has 3 blocks, the third pile has 4 blocks and the four pile has 6 blocks.


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