Question 1: Calculate: 15.36 − 7.89

Answer: 7.47

Question 2: Subtract: 23.45 − 12.34

Answer: 11.11

Question 3: Calculate: 9.87 − 4.56

Answer: 5.31

Question 4: What is 20.75 minus 8.49?

Answer: 12.26

Question 5: Calculate: 14.28 − 9.76

Answer: 4.52

Question 6: Subtract: 45.89 − 23.46

Answer: 22.43

Question 7: A shop has £65.78. After a sale, the total reduces by £12.45. How much money is left?

Answer: 53.33

Question 8: A car's fuel tank contains 52.75 litres. After driving, 17.36 litres are used. How much fuel remains?

Answer: 35.39

Question 9: A recipe requires 2.50 kg of sugar. If you have 7.75 kg, how much sugar is left after using the recipe twice?

Answer: 2.75

Question 10: Construct a rectangle on the grid with a length of 8.75 units and width of 3.50 units, ensuring to be precise with decimal points.

Answer: Correct construction on grid with accurate measurements.

Question 11: Plot the graph of y = 2x for x values 0, 1, 2, 3, 4.

Answer: Points plotted at (0,0), (1,2), (2,4), (3,6), (4,8).

Question 12: Identify and correct the common mistake in this subtraction: 18.45 − 9.6 = 8.85.

Answer: Correct answer is 8.85, but student should recognize the mistake of misplacing decimal points or incorrect subtraction, and fix it to 8.85.