Choosing an Efficient Strategy (Ex. 2)

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1. Question 1

   Multiple choice

   Which calculation would you use mental maths for?

2. Question 2

   Multiple choice

   When should you use the written column method?

3. Question 3

   Multiple choice

   Sam needs to work out 7,821 − 3,649. She says 'I'll use mental maths because the numbers look simple.' Is she right?

4. Question 4

   Sequence

   Strategy: round numbers → mental; irregular numbers → written. 4,000 − 2,000 → ___; 4,537 − 2,168 → ___.

5. Question 5

   True or false

   Choosing the right strategy makes solving problems faster and less prone to errors.

More exercises in this module

• Drawing Bar Charts (Ex. 3)

• Interpreting Time Graphs (Ex. 1)

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

• Problem-Solving Strategies (Ex. 3)

• Problem-Solving Strategies (Ex. 2)

• Choosing an Efficient Strategy (Ex. 1)