Lesson 30 Practice

  1. Moving Decimal Points.

    3.8 x 10^5: right, 5

    4.5 x 10^{-4}: left, 4

    7.8 x 10^6: right, 6

  2. Rewrite the Numbers. a) 8.5 x 10^9 b) 2.3 x 10^6 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 10^7 b) 3.88 x 10^{-1}
  5. Find the Products. a) 1.39 x 10^6 b) 9 x 10^{-5} c) 1.2 x 10^{10} d) 1 x 10^{4}
  6. Find the Quotients. a) 2 x 10^{15} b) 3 x 10^5 c) 4 x 10^{11}
  7. The Mariana Trench. a) diving to the bottom of the Mariana trench b) 7.0401 x 10^3