Calculate and solve problems with scientific notation

Answer Key - Grade 8 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   In math club, Ari multiplies (5 × 10^3) × (4 × 10^6). What is the product in scientific notation?

   2 × 10^10
2. 2.

   In math club, Bo multiplies (6 × 10^-4) × (3 × 10^9). What is the product in scientific notation?

   1.8 × 10^6
3. 3.

   In math club, Jun multiplies (8 × 10^5) × (7 × 10^4). What is the product in scientific notation?

   5.6 × 10^10
4. 4.

   In math club, Kira divides (6 × 10^-3) ÷ (2 × 10^-7). What is the quotient in scientific notation?

   3 × 10^4
5. 5.

   In math club, Luz divides (9 × 10^4) ÷ (3 × 10^-5). What is the quotient in scientific notation?

   3 × 10^9
6. 6.

   In math club, Milo divides (4 × 10^-2) ÷ (8 × 10^3). What is the quotient in scientific notation?

   5 × 10^-6
7. 7.

   A city library has 3.2 × 10^5 books and a school library 4.5 × 10^4. Noah adds them. What is the total in scientific notation?

   3.65 × 10^5
8. 8.

   Ren counts 1.2 × 10^8 stars in one photo and 9 × 10^6 in another. What is the total in scientific notation?

   1.29 × 10^8
9. 9.

   Zee's calculator shows 7.2E-8 after a science problem. What number is that in scientific notation?

   7.2 × 10^-8
10. 10.

    Ari's calculator shows 4.06E-3 after a science problem. What number is that in scientific notation?

    4.06 × 10^-3