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Use the number line to answer the question Zach bought 8 pieces of bubble gum that were $0.20 each. He used a number line to find the total cost. Choose the numbers to complete the sentences.

Zach started on number line at 0.2 for cost of one piece of gum. He moved ______ hash marks. Th e total cost is ________

1 answer

To find the total cost of 8 pieces of bubble gum at $0.20 each, we can calculate it as follows:

Total cost = Number of pieces × Cost per piece Total cost = 8 × $0.20 = $1.60

Now, regarding the movement on the number line:

  • Zach started at $0.20 (the cost of one piece of gum).
  • To find the total cost, he would have to move to $1.60.

The total movement in terms of hash marks would be:

1.60 - 0.20 = 1.40

Now, assuming each hash mark represents an increment of $0.20 (the cost of one piece of gum), we can calculate:

1.40 ÷ 0.20 = 7 hash marks

So, completing the sentences:

Zach started on the number line at 0.20 for the cost of one piece of gum. He moved 7 hash marks. The total cost is $1.60.