Question

What’s this in standard form

Answer 1

• Standard form : N × 10ⁿ

`\longmapsto (4 * {10}^( - 1) ) + (4 * {10}^( - 1) ) \\ = (4)/(10) + (4)/(10) \\ = ((4 + 4))/(10) \\ = (8)/(10) \\ = \boxed{8 * {10}^( - 1) }`

• 8×10^(-1) (in standard form) is the right answer.

Answer 2

0.8

Explanation:

• 
  `(4*10^-^1)+(4*10^-^1)`

• 
  `(4*0.1)+(4*0.1)`
• 
  `0.4 + 0.4`
• 
  `0.8`