1. **Problem a:** Choose two cards to make the sum a whole number, with the bigger number first. 2. The cards are 0.7, 4.05, 6.5, and 0.95. 3. We check pairs where the sum is a whole number: - $6.5 + 0.7 = 7.2$ (not whole) - $6.5 + 0.95 = 7.45$ (not whole) - $4.05 + 0.95 = 5.0$ (whole number!) - $4.05 + 0.7 = 4.75$ (not whole) - $0.7 + 0.95 = 1.65$ (not whole) 4. The only pair that sums to a whole number is $4.05 + 0.95 = 5.0$. 5. Since the bigger number goes first, the answer is: $$4.05 + 0.95 = 5$$ 6. **Problem b:** Choose two cards to make the sum as large as possible. 7. The two largest cards are 6.5 and 4.05. 8. Sum them: $$6.5 + 4.05 = 10.55$$ 9. Bigger number first, so: $$6.5 + 4.05 = 10.55$$