Question

0.021 +0.21 + 0.00021 +0.0021 = 0

O A. 0.0084
B. 0.084
OC. 0.2351
D. 0.23142
E. 0.23331

Answer 1

E. 0.23331

Explanation:

• 0.021 + 0.21 + 0.00021 + 0.0021

⇒ As 21 is a common factor, take the remaining as powers of 10.

• 21 (10⁻³ + 10⁻² + 10⁻⁵ + 10⁻⁴)
• 21 (0.001 + 0.01 + 0.00001 + 0.0001)
• 21 (0.01111)
• 21 x 0.01111
• 0.23331