Question

(4x10^4) x (2x10^3) in standard form

Answer 1

40,000 x 2,000
(4x10,000) x (2x1,000)
The answer is 80,000,000

Answer 2

Hey Ferne!
Multiplication is commutative and associative, so let's regroup these numbers so they're easier to multiply.


`\rm (4*10^4)*(2*10^3)=(4*2)*(10^4*10^3)`

Apply your exponent rule to the powers of 10, adding the exponents together, and multiply the 4 and 2,


`\rm =(8)*(10^(4+3))`

We can drop the brackets as a final step,


`\rm =8*10^7`

Hope that helps!