= Sign
Open Number Sentences
Solving a variety of fill-in-the blank number sentences, where
children need to keep the value of both sides the same is good practice
in algebraic thinking. Some good 2nd grade open number sentence
problems are:
3 + __ = 5 - 1
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14 + 3 = 10 + ___
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5 + 9 = __ + 6
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4 + 3 = 10 - __
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__ + 1 = 4 + 5
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16 - 4 = __ + 2
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The problems where the __ comes just to the right of the = are the
trickiest.
Sub problem:
If you were giving open number sentence problems where...
the first problem was
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5=___
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...
|
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...
|
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and the fourth was
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5 + 1 = __ + 2
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What would good choices be for problems 2 and 3 so that the
problems go from easy to hard?
Write down your ideas, and then look at my
suggestions