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Ben uses 45-cent stamps and 6-cent stamps to mail a CD to a friend. If the postage is $2.34, how many of each stamp did Ben use?

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sqdancefan

9514 1404 393

Answer:

  • 6-cent: 9
  • 45-cent: 4

Step-by-step explanation:

  2.34/0.06 = 39

Ben could use 39 6-cent stamps only. Each group of 15 6-cent stamps is worth 90 cents, so can be replaced by 2 45-cent stamps. There are 2 such groups possible in the 39 stamps. Replacing 30 6-cent stamps with 4 45-cent stamps leaves 9 6-cent stamps still needed.

Ben could use 4 45-cent stamps and 9 6-cent stamps.
9 6 cent stamps and 4 45 cent stamps
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