Examples of scientific notation for numbers less than 1

📚 Quick Study Guide

• 🔢 Scientific notation expresses numbers as $a \times 10^b$, where 1 ≤ |a| < 10 and b is an integer.
• ➗ For numbers less than 1, the exponent $b$ is negative.
• ➡️ Move the decimal point to the right until you have a number between 1 and 10.
• ➖ The exponent is the negative of the number of places you moved the decimal.
• 📝 Example: 0.0056 = $5.6 \times 10^{-3}$

Practice Quiz

1. Question 1: What is 0.00045 in scientific notation?
   1. $4.5 \times 10^{-4}$
   2. $4.5 \times 10^{4}$
   3. $45 \times 10^{-5}$
   4. $0.45 \times 10^{-3}$
2. Question 2: Express 0.00000729 in scientific notation.
   1. $7.29 \times 10^{-6}$
   2. $7.29 \times 10^{6}$
   3. $72.9 \times 10^{-7}$
   4. $0.729 \times 10^{-5}$
3. Question 3: What is the scientific notation for 0.0091?
   1. $9.1 \times 10^{-3}$
   2. $9.1 \times 10^{3}$
   3. $0.91 \times 10^{-2}$
   4. $91 \times 10^{-4}$
4. Question 4: Convert 0.000000101 into scientific notation.
   1. $1.01 \times 10^{-7}$
   2. $1.01 \times 10^{7}$
   3. $10.1 \times 10^{-8}$
   4. $0.101 \times 10^{-6}$
5. Question 5: Express 0.00005 in scientific notation.
   1. $5 \times 10^{-5}$
   2. $5 \times 10^{5}$
   3. $50 \times 10^{-6}$
   4. $0.5 \times 10^{-4}$
6. Question 6: What is 0.000000067 in scientific notation?
   1. $6.7 \times 10^{-8}$
   2. $6.7 \times 10^{8}$
   3. $67 \times 10^{-9}$
   4. $0.67 \times 10^{-7}$
7. Question 7: Convert 0.0042 into scientific notation.
   1. $4.2 \times 10^{-3}$
   2. $4.2 \times 10^{3}$
   3. $0.42 \times 10^{-2}$
   4. $42 \times 10^{-4}$