Question 1: Calculate the truncation of 7.839 to 2 decimal places. Write your answer in the grid.

Answer: 7.83

Question 2: Round 12.5678 to 3 decimal places. Write your answer in the grid.

Answer: 12.568

Question 3: Truncate 9.8765 to 2 decimal places.

Answer: 9.87

Question 4: Calculate the rounded value of 4.56789 to 4 decimal places.

Answer: 4.5679

Question 5: A calculator shows a value of 3.14159265. Truncate this value to 4 decimal places. Write your answer.

Answer: 3.1415

Question 6: Round 0.04987 to 3 decimal places.

Answer: 0.050

Question 7: A machine displays 123.456789. Truncate this to 3 decimal places and explain why.

Answer: Truncation cuts off after the third decimal without rounding, so answer is 123.456 because it simply discards the subsequent digits.

Question 8: A measurement reads 15.98765 meters. If we round to 3 decimal places, what is the value? Show your working.

Answer: 15.988

Question 9: Identify the mistake in this student's calculation: They truncated 8.23456 to 8.23 instead of rounding to two decimal places. What is the correct value if rounding?

Answer: The correct rounding is 8.23 because the third digit is 4, which does not round the second digit up; their truncation is correct if they intended to truncate, but if they wanted to round, it would be 8.23.

Question 10: Plot the graph of y=2x for x-values from 0 to 5 on the grid.

Answer:

Question 11: Construct a triangle with side lengths 5.7, 8.3, and 10.2 units. Use truncation or rounding as needed and explain the choice.

Answer: Use rounded lengths for simplicity: 5.7, 8.3, and 10.2 units. This helps in precise construction, but if accuracy is needed, keep original measurements.