Explaining How an Answer Was Found (Ex. 1)

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1. Question 1

   Multiple choice

   A student says '3,450 + 2,000 = 5,450 because I added the thousands: 3+2=5, giving 5,450.' Is this correct?

2. Question 2

   Multiple choice

   Which is the best explanation for why 7,000 − 3,000 = 4,000?

3. Question 3

   Multiple choice

   How would you explain that 5,200 is between 5,000 and 6,000?

4. Question 4

   Sequence

   Step 1: Round 4,782 → 5,000. Step 2: Round 2,345 → 2,000. Step 3: Estimate = ___.

5. Question 5

   True or false

   Using words and numbers together makes mathematical explanations clearer.

More exercises in this module

• Drawing Bar Charts (Ex. 3)

• Interpreting Time Graphs (Ex. 1)

• Choosing an Efficient Strategy (Ex. 2)

• Explaining How an Answer Was Found (Ex. 2)

• Problem-Solving Strategies (Ex. 3)

• Problem-Solving Strategies (Ex. 2)