1. The problem statement, all variables and given/known data Calculate ##(4.3 \times 10^8)+(2.5 \times 10^7)## Give your answer in standard form The total marks for the question is 2 2. Relevant equations 3. The attempt at a solution The answer is ##4.55 \times 10^8## because that's what my calculator gave. That will score me one mark. I am not sure how to score the other mark. The mark scheme says 1 mark should be given if figures '455' are seen. What figures 455? I am confused.