Higher Order Thinking Relationship Between Addition & Subtraction Discussion Question -­‐ Day 1 What do you think is the purpose of inverse operations?
Why would you use an inverse operation?
Why is it helpful to know fact families? Do you think this will help you solve
problems?
Discussion Question -­‐ Day 2 When have you had to add or subtract three-digit numbers?
Do you think you will need to know how to add or subtract large numbers in your
head for any reason?
Discussion Question -­‐ Day 3 Explain, in your own words, how to use the regrouping method.
Do you think the regrouping method is helpful when adding large numbers? Why
or why not?
Why is it important to understand place value for this lesson?
Discussion Question -­‐ Day 4 How is regrouping a subtraction problem different from regrouping an addition
problem?
Why is it important to use column subtraction when regrouping? Why do we
regroup the problem so that larger numbers are on top of the smaller numbers?
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