Choosing an Efficient Strategy (Ex. 1)

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1. Question 1

   Multiple choice

   Which strategy is most efficient for 4,000 − 2,000?

2. Question 2

   Multiple choice

   Which strategy is best for 4,387 + 3,956?

3. Question 3

   Multiple choice

   A problem involves 8,253 − 3,729. Why might you use a written method rather than mental calculation?

4. Question 4

   Sequence

   Easy mental: 3,000 + 4,000 = ___; needs column: 3,457 + 4,289 = ___.

5. Question 5

   True or false

   For 5,000 − 500, mental calculation is more efficient than column method.

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)