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# Grade 1 Operations and Algebraic Thinking Free Bundle

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## What’s inside?

• FREE topics on Grade 1 Operations and Algebraic Thinking domain
• FREE Activities
• FREE 10-item quiz
• FREE List of related topics

This fantastic bundle includes FREE worksheets and quiz items about Operations and Algebraic Thinking. These ready-to-use Common Core-aligned, Grade 1 Math worksheets, are perfectly paired with premium End-of-Year test booklets.

## Common Core Standards (1.OA)

Represent and solve problems involving addition and subtraction.

1. 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.2
2. Solve word problems that call for addition of three whole numbers
whose sum is less than or equal to 20, e.g., by using objects, drawings,
and equations with a symbol for the unknown number to represent the
problem.

Understand and apply properties of operations and the relationship

1. Apply properties of operations as strategies to add and subtract.3 Examples:
If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of
addition.) To add 2 + 6 + 4, the second two numbers can be added to make
a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
2. Understand subtraction as an unknown-addend problem. For example,
subtract 10 – 8 by finding the number that makes 10 when added to 8.

1. Relate counting to addition and subtraction (e.g., by counting on 2 to
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).

Work with addition and subtraction equations.

1. Understand the meaning of the equal sign, and determine if equations
involving addition and subtraction are true or false. For example, which
of the following equations are true and which are false? 6 = 6, 7 = 8 – 1,
5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
2. Determine the unknown whole number in an addition or subtraction
equation relating three whole numbers. For example, determine the
unknown number that makes the equation true in each of the equations 8 +
? = 11, 5 = � – 3, 6 + 6 = �.

## Resource Examples

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