Look at Problem A. Which symbol will complete the number sentence? Explain.
The > symbol will complete the sentence, because 20 has 2 tens and 14 only has 1 ten.
If the problem was 18 ___ 14, how would you know what symbol to use to complete the sentence?
Compare the ones digits, since the tens would be the same. 14 only has 4 ones, so it's smaller than 18.
What is the difference of
20 – 14?
If you had the objects from Problem B in front of you, how would you compare them?
Possible responses: line them up along one side, or lay them on top of each other.
Put the objects in order from shortest to longest.
Thumbtack, marker, pencil, book.
Look at Problem C. How many inches long is the eraser?
How many centimeters long is the eraser?
Why are there more centimeters than inches?
Centimeters are smaller than inches, so it takes more centimeters to cover the same length.
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