1. The problem is to verify the correctness of the given arithmetic calculations. 2. Addition and subtraction are straightforward: sum or difference of numbers. 3. Multiplication and division require careful calculation and checking intermediate steps. 4. Check each calculation: - $4.19 + 3.87 = 8.06$ $$4.19 + 3.87 = 8.06$$ This is correct. - $2.84 + 3.76 = 6.60$ $$2.84 + 3.76 = 6.60$$ This is correct. - $11.32 - 7.95 = 3.37$ $$11.32 - 7.95 = 3.37$$ This is correct. - $100 - 74.5 = 64.5$ $$100 - 74.5 = 25.5$$ The given answer $64.5$ is incorrect; correct difference is $25.5$. - $80 \times 64 = 809$ Calculate: $$80 \times 64 = 5120$$ The given answer $809$ is incorrect. - $105 \times 28 = 2280$ Calculate: $$105 \times 28 = 2940$$ The given answer $2280$ is incorrect. - $884 \div 26 = 9$ Calculate: $$26 \times 34 = 884$$ So, $884 \div 26 = 34$, not $9$. - $1435 \div 35 = 7$ Calculate: $$35 \times 41 = 1435$$ So, $1435 \div 35 = 41$, not $7$. 5. Summary: The first three addition/subtraction problems are correct. The last five calculations have errors in the answers provided. Final answer: Only the first three calculations are correct; the rest are incorrect.