Working with standard form

Which of these has the greatest value?

• 6.15 × 10⁴

• 61499

• 6.2 × 10³

• 61.6 × 10³

(4 x 10⁵) x (2 x 10⁴)

• 6 x 10⁹

• 8 x 10⁹

• 8 x 10²⁰

• 6 x 10²⁰

(5 x 10⁶) x (7 x 10⁸)

• 35 x 10¹⁴

• 3.5 x 10¹⁴

• 3.5 x 10¹⁵

• 3.5 x 10¹³

(3 x 10⁴) ÷ (6 x 10^-3)

• 0.5 x 10⁷

• 5 x 10⁰

• 5 x 10⁸

• 5 x 10⁶

(2.1 x 10^-5) ÷ (7 x 10^-4)

• 0.3 x 10^-1

• 3 x 10^-2

• 0.3 x 10^-9

• 3 x 10^-10

(5 x 10⁴)²

• 2.5 x 10⁹

• 25 x 10⁶

• 2.5 x 10⁷

• 1.0 x 10⁹

(4.5 x 10⁷) ÷ (5 x 10⁻²)

• 0.9 x 10⁵

• 9 x 10⁴

• 0.9 x 10⁹

• 9 x 10⁸

• 9 x 10¹⁰

The population of England is 5 x 10⁷

The number of people who live in London is 8 x 10⁶

What percentage of the population of England live in London?

• 4%

• 20%

• 16%

• 6.25%

5.55×10¹¹ + 5.4×10¹²

(answer in standard form)

• 29.97 x 10²³

• 5.955 x 10²³

• 5.955 × 10¹²

• 59.55 x 10¹¹

4.63 × 10¹⁹ + 1.92 × 10²¹

(answer in standard form)

• 8.8896 x 10⁴⁰

• 6.55 x 10²¹

• 196.63 x 10¹⁹

• 1.9663 × 10²¹