Question 1: Calculate 4532 - 1789 using multiple exchanges. Write your working clearly.

Answer: 2743

Question 2: Subtract 7621 - 3498. Show each step of the multiple exchange process.

Answer: 4123

Question 3: A shop has 4857 pencils. They sell 2369 pencils. How many pencils are left? Use multiple exchanges to find the answer.

Answer: 2488

Question 4: Explain why borrowing (exchanging) is necessary in subtracting 8043 - 1795.

Answer: Because in the units, 3 minus 5 is not possible without borrowing from the tens, which requires exchanging values to perform the subtraction.

Question 5: Calculate 9704 - 3851 by performing multiple exchanges. Show all steps.

Answer: 5853

Question 6: A library has 12694 books. They are to be divided equally into 4 shelves. How many books will be on each shelf? Use multiple exchanges to divide.

Answer: 3173

Question 7: Subtract 10000 - 4736. Show your working using multiple exchanges.

Answer: 5264

Question 8: A factory produces 8645 units daily. If they produce 2789 units less than yesterday, how many units did they produce yesterday? Use multiple exchanges to find the answer.

Answer: 5856

Question 9: Challenge: Subtract 9821 - 4689 using the multiple exchanges method. Write down your process.

Answer: 5132

Question 10: Error Analysis: A student subtracts 6754 - 2895 and gets 3859. Identify the mistake and correct it.

Answer: The student did not borrow properly during the subtraction; correct process shows the answer is 3859.

Question 11: Plot the graph of y=2x for x from 0 to 10 on the grid.

Answer: Students will draw a straight line connecting points (0,0), (1,2), (2,4), ..., (10,20).