Mr. Black’s Math Class

EQ: What is scientific notation? How is it used to demonstrate real-life numbers?

BR: Evaluate each expression.

1. 10³
2. 10^-4
3. 100²
4. 10^-8
5. 10¹⁰

Lesson:

1. Discuss BR.
2. Discuss scientific notation.
3. Discuss rewriting numbers in scientific notation in decimal form.
   1. 2.834 × 10²
   2. 4.9 × 10⁵
   3. 7.8 × 10^-1
   4. 1.23 × 10^-6
4. Discuss rewriting numbers in decimal form in scientific notation.
   1. 34,690
   2. 1.78
   3. 0.039
   4. 0.000722
   5. 5,6000,000,000
5. Discuss computing numbers with scientific notation.
   1. (1.4 × 10⁴)(7.6 × 10³)
   2. (1.2 × 10^-1) ÷ (4.8 × 10^-4)
   3. (4.0 × 10^-2)³
6. Discuss using a calculator and reading numbers in scientific notation.
   1. 0.000000748 × 2,400,000,000
   2. 0.000094³
7. Discuss real-life situations using multiplication with scientific notation.
   How much water does the Amazon River discharge into the Atlantic Ocean each year if it contributes 4.2 × 10⁶ cubic feet of water each second.
   
8. Discuss real-life situations using division with scientific notation.
   In 1867, the United State purchased Alaska from Russia for $7.2 million. The total area of Alaska is about 3.78 × 10⁸ acres. What was the price per acre?

Assignment:
pg. 473 # 1 – 15 (in class)
pp. 473 – 475 # 16 – 36, 37 – 51 odd, 53 – 57, 59 – 65 odd, 67 – 73 odd, 80 – 83