Test Review Scientific Notation, Exponent rules, Rational number

Solve:
(2.1×10​²​​) × (3.0×10​⁴)

• 5.1 x 10²
• 6.3 x 10⁶
• 5.1 x 10⁶
• 6.3 x 10⁸

Solve:

(6 x 10⁶) / (2 x 10³)

• 12 x 10³

• 3 x 10⁹

• 1.2 x 10¹⁰

• 3 x 10³

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

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

• 11.0 x 10⁶

• 1.1 x 10¹⁰
• 1.1 x 10¹¹
• 1.1 x 10 ⁶

Write the answer in scientific notation.
4.1 x 10⁵ +   5.5 x 10⁶  =

• 5.91 x 10⁶
• 9.6 x 10⁵
• 9.6 x 10¹¹
• 4.65 x 10⁵

Solve:

(8.0 x 10¹³) - (7.5 x 10¹²)

• 5.0 x 10²

• 0.5 x 10¹

• 7.25x 10¹³

• 5.0 x 10¹³

(9.6×10^-8)÷(2×10^-15)

• -4.8×10⁷

• 4.8×10⁷

• 4.8×10^-7

• 4.8×10^-23

When you are multiplying two numbers in scientific notation, do you need to make the exponents match?

• Yes

• No

When adding or subtracting two numbers in scientific notation, the exponents must match.

• True; changing them will change where the decimal point is.

• False; you only need to add them together.

• False; you only need to subtract them.

• True; changing the exponent doesn't change anything else about the decimal.

Solve:

(2.74 x 10⁷) + (5.6 x 10⁷)

• 8.34 x 10⁷

• 8.34 x 10¹⁴

• 8.34 x 10⁰

• 8.34 x 10¹