Question 1: Estimate the sum of 478 and 365 by rounding to the nearest hundred.

Answer: 900

Question 2: Quickly estimate the product of 49 and 6 by rounding.

Answer: 294

Question 3: A farmer has approximately 125 cows and 78 sheep. Estimate the total number of animals.

Answer: 200

Question 4: Estimate the distance traveled if a car goes 137 km in 2 hours. Round to the nearest 50 km.

Answer: 150

Question 5: Estimate 643 divided by 8 using compatible numbers.

Answer: 80

Question 6: Multiply 56 by 9 using estimation. Explain your reasoning.

Answer: 500 (since 56≈60, and 60×9=540)

Question 7: Estimate the total cost if one notebook costs $3.75 and you buy 12 notebooks.

Answer: 45

Question 8: A recipe calls for 2.5 cups of sugar. Estimate the amount needed if you want to make 4 batches.

Answer: 10

Question 9: A factory produces approximately 1250 units daily. Estimate weekly production.

Answer: 8700

Question 10: Estimate the difference between 982 and 467 by rounding to the nearest hundred.

Answer: 500

Question 11: Identify and correct the mistake: Estimating 348 + 257 as 600.

Answer: The correct estimate is 600, but actual sum is 605. The estimation is acceptable but slightly off.

Question 12: A classroom has approximately 23 students. If 4 classes are similar, estimate the total number of students.

Answer: 90