Question 1: Round 47 to the nearest 10.

Answer: 50

Question 2: Round 123 to the nearest 10.

Answer: 120

Question 3: Calculate the value of 86 rounded to the nearest 10.

Answer: 90

Question 4: Estimate the sum of 74 and 86 by rounding each to the nearest 10, then adding.

Answer: 150

Question 5: Identify the mistake: A student rounds 69 to 70, but claims the correct answer is 60. What is the error?

Answer: Incorrectly rounding 69 to 70 is correct; the mistake is claiming 60 is correct.

Question 6: Round 234 to the nearest 10.

Answer: 230

Question 7: Plot the point (x, y) on the grid where x=37 and y=92. Round both to the nearest 10 and plot the rounded points.

Answer: x=40, y=90

Question 8: Construct a triangle with side lengths of 48, 53, and 47. Round each side to the nearest 10.

Answer: 50, 50, 50

Question 9: Estimate the total cost of items priced at $47, $62, and $89 by rounding each to the nearest 10 and then summing.

Answer: 50 + 60 + 90 = 200

Question 10: Find the next multiple of 10 after 68.

Answer: 70

Question 11: A value is incorrectly rounded down from 73 to 70. Is this correct? Explain why or why not.

Answer: No, 73 should round to 70, so the rounding is correct.

Question 12: Challenge: Round 1573 to the nearest 10, then explain the reasoning.

Answer: 1573 rounds to 1570 because the digit in the units place is 3, which is less than 5, so we round down.