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Keith wrote the expression 10d to represent the number of dimes in d dollars. Is Keith's expression correct? Explain.

  • Math -


  • Math -

    Can you explain? I was thinking that d/10 would be the answer, since there are 10 dimes in a dollar. If the expression was 10d wouldn't that mean 10 dimes X 1 dollar?

  • Math -

    10 dimes = $1.00
    20 dimes = $2.00
    30 dimes = $3.00

    So --
    10 times 3 = 30
    10 times 4 = 40

  • Math -

    5 doller bills and 3 dimes

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