Which number is the largest? 7.2 × 10^-6, 3.09 × 10³, 2.04 × 10⁴, 5 × 10³

Solution:

Given, the numbers are 7.2 × 10^-6, 3.09 × 10³, 2.04 × 10⁴, 5 × 10³

All numbers can be written in standard form as

(1) 7.2  × 10^-6 = (72 / 10) × (1 / 1000000)

= 0.0000072

(2) 3.09 × 10³ = (309 / 100) × (1000)

= 3090

(3) 2.04 × 10⁴ = (204 / 100) × (10000)

= 20400

(4) 5 × 10³ = 5 × (1000)

= 5000

The decimal number is the least number among all.

The five-digit number is the greatest number among all.

Therefore, the largest number is 2.04 × 10⁴.

Which number is the largest? 7.2 × 10^-6, 3.09 × 10³, 2.04 × 10⁴, 5 × 10³

Summary:

The largest number among 7.2 × 10^-6, 3.09 × 10³, 2.04 × 10⁴, 5 × 10³ is 2.04 × 10⁴.