Lesson 30 Practice

  1. Moving Decimal Points.

    3.8 x 105: right, 5

    4.5 x 10-4: left, 4

    7.8 x 106: right, 6

  2. Rewrite the Numbers. a) 8.5 x 109 b) 2.3 x 106 c) 5 x 10-6 d) 3.24 x 10-7
  3. Normal Numbers. a) 390000 b) 0.000183 c) 45020000
  4. Find the Sums. a) 2.03 x 107 b) 3.88 x 10-1
  5. Find the Products. a) 1.39 x 106 b) 9 x 10-5 c) 1.2 x 1010 d) 1 x 104
  6. Find the Quotients. a) 2 x 1015 b) 3 x 105 c) 4 x 1011
  7. The Mariana Trench. a) diving to the bottom of the Mariana trench b) 7.0401 x 103