Furthering understanding of subtraction as decreasing an amount
Lesson 7 / 10
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Lesson outcome
I can compare subtraction as decreasing an amount to other addition and subtraction structures.
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Subtraction can be seen as both partitioning and as decreasing an amount.
Both types of subtraction stories are represented by the same equation.
In an addition story, the amount at the start of the story is increased.
In an subtraction story, the amount at the start of the story is decreased.
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