Multiplying with Scientific Notation Mrs. Spanier Pre-Algebra Video

Write the answer in scientific notation. (5 x 10 4 )(7 x 10 5 ) = (5 x 7)(10 4 x 10 5 ) = (35)( ) = 35 x 10 9 But we ’ re not done yet…

Write the answer in scientific notation. 35 x is not between 1 and 10! So… move decimal and add one more place … 3.5 x 10 10

Write the answer in scientific notation. (8 x 10 2 )(5 x 10 2 ) = (8 x 5)(10 2 x 10 2 ) = (40)( ) = 40 x 10 4 = 4 x 10 5

Write the answer in scientific notation. (9 x 10 4 )(4 x 10 5 ) 3.6 x (1.5 x 10 3 )(2 x 10 5 ) 3 x 10 8

Dividing with Scientific Notation Mrs. Spanier Pre-Algebra Video

Write the answer in scientific notation. (4 x 10 9 ) (8 x 10 5 ) = = = It ’ s not done yet…

Write the answer in scientific notation not between 1 & 10! Move the decimal to the right, and subtract one from the exponent. 5 x 10 3

Write the answer in scientific notation. (6 x )  (2 x 10 7 ) = (6/2) (1.2 x 10 2 )  (4 x 10 8 ) = 0.3 x = 3 x 10 -7

Evaluate without a calculator. (4 x ) x x 10 4 ¼ x x ,500 (5 x ) x x

TOD: Evaluate without a calculator. (2 x ) x x /16 x /16 x x x x 10²

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