1.   Use estimation to place the decimal point in the product
18.7 × 21 = 3927.
    A. 3927.0 B. 392.7
    C. 39.27 D. 3.927
    Hint

  2.  
    A. 15 B. 1.5
    C. 0.15 D. 150
    Hint

  3.   A dollar bill is 6.125 inches long. Caitlin used it as a measuring device and found that her shelf was 5 times the length of the dollar bill. How long is her shelf?
    A. 306.05 in. B. 30.605 in.
    C. 306.25 in. D. 30.625 in.
    Hint

  4.   Write 7.2 × 106 in standard form.
    A. 720,000 B. 7,200,000
    C. 72,000,000 D. 0.0000072
    Hint

  5.   Write 1.85 × 102 in standard form.
    A. 185 B. 1,850
    C. 0.185 D. 1.85
    Hint



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