Addition Facts. 1st Grade Math Worksheets and Answer key, Study Guides and Vocabulary Sets.. Louisiana Academic Standards

◂Math Worksheets and Study Guides First Grade. Addition Facts

Study Guide

Addition Facts Worksheet/Answer key

Addition and Subtraction Worksheet/Answer key

Add it up for Christmas Vocabulary/Answer key

Addition Facts Vocabulary/Answer key

Addition Facts

Create And Print more Subtraction Facts worksheets with Math Facts Worksheets generator

The resources above correspond to the standards listed below:

Louisiana Academic Standards

LA.1.OA. Operations and Algebraic Thinking

1.OA.B. Understand and apply properties of operations and the relationship between addition and subtraction.

1.OA.B.4. Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.

1.OA.C. Add and subtract within 20.

1.OA.C.5. Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

1.OA.C.6. Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use mental 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).

LA.1.NBT. Number and Operations in Base Ten

1.NBT.C. Use place value understanding and properties of operations to add and subtract.

1.NBT.C.4. Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10.

1.NBT.C.4.a. Use concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a number sentence; justify the reasoning used with a written explanation.

1.NBT.C.4.b. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

Standards

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