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# Subtracting Numbers up to 20    Grade Levels
PreK - 2nd, Homeschool
Subjects
Standards
Resource Type
Formats Included
• PDF
Pages
3 pages
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### Description

Maths Year K,1,2
ACMNA015:
Represent and solve simple addition and subtraction problems using a range of strategies including counting on, partitioning and rearranging parts
Total Pages
3 pages
Answer Key
Not Included
Teaching Duration
30 minutes
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### Standards

to see state-specific standards (only available in the US).
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

### Questions & Answers

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