Question 1: Calculate the total length when 2.5 m is added to 3.7 m.

Answer: 6.2

Question 2: Add 1.3 m, 2.4 m, and 0.9 m. What is the total length?

Answer: 4.6

Question 3: A piece of wood is 4.2 m long. Another piece is 3.8 m long. What is their combined length?

Answer: 8.0

Question 4: Construct a line segment of length 5.7 m on the grid.

Answer: Student draws a 5.7m segment on the graph paper.

Question 5: Add 0.9 m and 4.3 m. What is the sum?

Answer: 5.2

Question 6: A pipe is 1.6 m long. Another pipe is 2.4 m long. Find their total length.

Answer: 4.0

Question 7: In a building project, lengths of 3.3 m, 2.7 m, and 4.1 m are combined. Calculate the total length.

Answer: 10.1

Question 8: A garden bed is 2.45 m long and another section is 3.55 m long. What is their total length?

Answer: 6.0

Question 9: Add 1.2 m, 2.8 m, and 3.9 m. What is the total?

Answer: 7.9

Question 10: A fishing rod is 4.75 m long. If another rod is 3.25 m long, what is their combined length?

Answer: 8.0

Question 11: A length measurement error occurs when adding 2.5 m and 3.6 m. If a student calculates 5.1 m instead of the correct answer, what mistake might they have made?

Answer: Possible mistake: misaligned decimal points or incorrect addition of digits.

Question 12: A carpenter combines lengths of 2.3 m, 1.7 m, and 3.2 m. They make a mistake and get 6.2 m instead of the correct total. Identify the error.

Answer: Common mistake: incorrectly adding 1.7 + 3.2 as 5.4, then adding 2.3 to get 7.7, but student may have misaligned decimal points or misread the addition.