To find the total cost of the pencils using a number line, we can break it down step by step.
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Identify the starting point: Start at 0 on the number line, which represents $0.
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Mark intervals: Each pencil costs $0.20. Since John is buying 6 pencils, you would mark increments of $0.20 on the number line.
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Count the increments: You need to mark 6 parts on the number line, one for each pencil.
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Calculate each mark: Start at 0 and move to the right:
- 1st mark: $0.20
- 2nd mark: $0.40
- 3rd mark: $0.60
- 4th mark: $0.80
- 5th mark: $1.00
- 6th mark: $1.20
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Final total: The product of the number of pencils (6) and the cost per pencil ($0.20) represents the total cost, which is $1.20.
So, to fill in the blanks:
Start at 0 on the number line, mark 6 parts that are each $0.20. The product 6 x $0.20 represents the total cost, which is $1.20.