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Post-it Challenge

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What we know: Griffin started off with 52 balloons, he let go of 29 balloons

What we need to find out: how many balloons Griffin has left

52-29=

What we notice: the subtrahend is very close to a landmark, the difference is missing, the answer will be less than 52

Model: open number line

Strategies: splitting & jumping to, from or by a landmark number

Post-it Challenge

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What we know: Gavin had 36 books, Harriett gave him 45 more

What we need to figure out: how many books Gavin has now

37+45

what we notice: the sum is missing, the sum will end in a 2 because 7+5=12, both addends are not landmarks

model: open number line

strategies: splitting & jumping to, from or by a landmark number

Parent/Teacher Conference Sign Up

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*15 minute conference
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