Question 1
Printed positive marks are preserved per question. The source uses different blank-answer and incorrect-answer rules by section, including an optional bonus penalty; the import does not reproduce that complete official scoring scheme.
Given $2+0.5+0.06+0.002=a$ and $2+0.0+0.01+0.009=b$, what is the difference between a and b?
Given $2+0.5+0.06+0.002=a$ and $2+0.0+0.01+0.009=b$, what is the difference between a and b?