Problem-Solving Strategies (Ex. 2)

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1. Question 1

   Multiple choice

   To solve 1,000 − 376, which strategy would work well?

2. Question 2

   Multiple choice

   You calculated 54 + 38 = 92. Which is the best way to check?

3. Question 3

   Multiple choice

   A shop sells 156 apples on Monday and 214 on Tuesday. What is the best estimate of the total?

4. Question 4

   Sequence

   Checking subtraction: if 75 − 38 = 37, then 37 + 38 = ___.

5. Question 5

   True or false

   Using the inverse operation is a reliable way to check your answer.

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)

• Choosing an Efficient Strategy (Ex. 1)