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Grade 8 Algebra: Adding and Subtracting in Scientific Notation

Name: ______________________Date: ____________Score: ____ / 8

Level 3

Negative exponents and regrouping

  1. 1. Add or subtract. Write in scientific notation:
    (4×10−3)+(3×10−3)(4 \times 10^{-3}) + (3 \times 10^{-3})
  2. 2. Add or subtract. Write in scientific notation:
    (6×10−2)−(4×10−3)(6 \times 10^{-2}) - (4 \times 10^{-3})
  3. 3. Add or subtract. Write in scientific notation:
    (8×104)+(5×104)(8 \times 10^4) + (5 \times 10^4)
  4. 4. Add or subtract. Write in scientific notation:
    (2×10−5)+(9×10−6)(2 \times 10^{-5}) + (9 \times 10^{-6})
  5. 5. Add or subtract. Write in scientific notation:
    (1.5×103)−(9×102)(1.5 \times 10^3) - (9 \times 10^2)
  6. 6. Add or subtract. Write in scientific notation:
    (9.5×106)+(8×105)(9.5 \times 10^6) + (8 \times 10^5)
  7. 7. Add or subtract. Write in scientific notation:
    (7×10−4)−(5×10−5)(7 \times 10^{-4}) - (5 \times 10^{-5})
  8. 8. Add or subtract. Write in scientific notation:
    (6.5×102)+(4.5×102)(6.5 \times 10^{2}) + (4.5 \times 10^{2})