Computing with Scientific Notations

The Disney Online store sold 2 x 10⁴ Anna dolls last year.  They also sold 8 x 10⁴ Elsa dolls.  How many more Elsa dolls were sold than Anna dolls?

• 4.0 x 10⁰ more dolls

• 10 x 10⁴ more dolls

• 6.0 x 10⁴ more dolls

• 6.0 x 10⁰ more dolls

Write the expression shown as a number in scientific notation.

• 4 x 10⁵

• 1.35 x 10⁶

• 1.35 x 10⁵

• 1.25 x 10⁶

The Earth is approximately 90,000,000 miles from the sun.  How long does it take light from the sun to reach the earth?  Use the speed of light to be approximately 2 x 10⁵ miles per second.

• 4.5 x 10² seconds

• 4.5 seconds

• 2.2 x 10² seconds

• 4.5 x 10¹ seconds

Write the answer in scientific notation.
7.3 x 10⁵  +   3.7 x 10⁵  =

• 11.0 x 10⁵

• 1.1 x 10¹⁰

• 1.10 x 10¹¹

• 1.1 x 10 ⁶

Write the answer in scientific notation.
5 x 10⁸ -   3.4 x 10⁸  =

• 2.4 x 10⁸

• 2.4 x 10⁰

• 1.6 x 10⁰

• 1.6 x 10⁸

How would you write 4.3756 x 10⁴ in standard form?

• 437,560,000

• 0.00043756

• 43,756

• 4,3756

How would you write 0.0005 in scientific notation?

• 50 x 10^-5

• 5 x 10^-4

• 5 x 10³

• .5 x 10³

How would you write -5.6 x 10^-3 in standard form?

• 0.0056

• -5,600

• 0.00056

• -0.0056

UNDERSTANDING:
The first number in scientific notation must be...

• between and including 0 and 10

• between and including 1 and 9.9999

• between and including 0 and 9.999

• between and including 1 and 10