Clarifications:
Essential Understandings
Concrete:
- For unknown addends, make a set with objects from a given addition equation within 10.
- Add objects to the set to reach the given sum.
- Count the number of objects added to find the unknown addend. (Ex: 8 + ? = 10)
- For a subtraction equation with an unknown number, make a set of objects within 10. Separate objects from the set and count to determine how many were ‘taken from’ the set (Ex: 3 - ? = 1) or the difference (Ex. 3 – 2 = ?).
- Make a set with visuals from a given addition or subtraction equation within 10.
- Join or separate visuals and count to determine how many were ‘added to’ the set, ‘taken from’ the set.
- Understand the following concepts, symbols, and vocabulary of +, - and =.
| Number: MAFS.1.OA.4.AP.8a | Category: Access Points |
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Cluster:
Work with addition and subtraction equations. (Major Cluster) : Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters. |