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Exponents MUST BE THE SAME before you can add/subtract 2 numbers written in scientific notation.
Example 1: 7.35 x 102 m + 2.43 x 102 m = ?› Are exponents the same?› If yes, just add the 7.35 + 2.43, and make
the answer x 10?. Example 2: 2.70 x 107 + 15.6 x 106 +
0.165 x 108 = ?› Are exponents the same?› Make them the same, then add. (See p.32)
Practice Problems (p.32): 14 (a and h ONLY)
Multiplying: › Multiply the first 2 numbers› Add the exponents› Example: (2 x 103) x (3 x 102) = 6 x 105
Dividing:› Divide the first 2 numbers› Subtract the exponent of the divisor
from the exponent of the dividend.› Example: (9 x 108) ÷ (3 x 10-4) = 3 x 1012
Examples: P.34 (17) Practice: P.34 (18) Practice:
