Math 8: Exponents & Scientific Notation
Notes #____
Section #11: Add & Subtract with Scientific Notation.. CCSS-8.EE. 3 & 4.
Corresponds with Module 1, Lessons 10.
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Adding and Subtracting numbers in scientific notation.
1. Before you can add or subtract numbers in scientific notations, the numbers must
be multiplied by the ______________ power of 10.
2. REMEMBER, the power of 10 is directly linked to the ____________________
of the finite number.
3. Changing the power of 10 has the _______________ effect on the decimal place.
4. Add or subtract the __________________ and _____________ the power of 10.
5. Make sure answer is in _________________________________, if not, fix it.
Example #1: Evaluate each expression and write answer in scientific notation.
a) (6.89 × 104) + (9.24 × 105)
b) (7.83 × 108) – 11,600,000
You Try:
1) (5.32 × 108) – (4.6 × 106)
2) (9.6 × 106) + 345,000
Math 8: Exponents & Scientific Notation
HW #____
Section #11: Add & Subtract with Scientific Notation.. CCSS-8.EE. 3 & 4.
Corresponds with Module 1, Lessons 10.
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Evaluate each expression and write answer in scientific notation.
1) 3,640,000 – (2.18 × 104)
2) (2.82 × 109) + 63,000,000
3) (2.7 x 103) + (3.4 x 102)
4) (9.5 x 1011) + (6.3 x 109)
5) (8.4 x 105) – (7.9 x 104)
6) (2.6 x 109) – (7.4 x 107)
7) 28,500,000 + (1.61 × 109)
8) 8,230,000 – (3.91 × 105)
9) (7.83 × 108) – 11,610,000
10) 68,900 + (9.24 × 105)
H.O.T. Problems (Higher Order Thinking)
Which one doesn’t belong: Identify which expression does not belong with the other three. Explain
your reasoning.
a) 14.28 x 109
b) (3.4 x 106)(4.2 x 103)
c) 1.428 x 109
d) (2.34 x 109) + (1.194 x 1010)
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