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- 1.OA.C.5Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
- 1.OA.C.6Add 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).

1.OA.C.6

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).

Adding and Subtracting Multiples of Ten

1st Grade Math

» Unit:

The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

Big Idea:Students will apply the idea of adding or subtracting ten to a number by adding or subtracting multiple groups of ten from a number.

Thomas Young

Suburban Env.

22 Resources

23 Favorites

22 Resources

23 Favorites

Equal or Not?

1st Grade Math

» Unit:

Understanding Equality

Big Idea:Students play an interactive game and practice crucial math fluency in this lesson on the meaning of the equals sign.

Amanda Cole

Urban Env.

19 Resources

27 Favorites

19 Resources

27 Favorites

Identify Related Facts - Day 1 of 2

1st Grade Math

» Unit:

Single Digit Addition and Subtraction

Big Idea:It's all in the family! In this lesson, students will begin to identify and understand the relationship between addition and subtraction sentences.

Lisa Murdock

Urban Env.

12 Resources

28 Favorites

12 Resources

28 Favorites

Use Addition to Check Subtraction

1st Grade Math

» Unit:

Single Digit Addition and Subtraction

Big Idea:Undo what can be undone! In this lesson, students will use addition to check subtraction to make sure their answer is correct.

Lisa Murdock

Urban Env.

12 Resources

13 Favorites

12 Resources

13 Favorites

How Many Dots?

1st Grade Math

» Unit:

The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

Big Idea:Students will engage in a variety of activities that ask them to represent numbers with groups of ten and have them counting by 10s.

Thomas Young

Suburban Env.

29 Resources

30 Favorites

29 Resources

30 Favorites

Explain a double

1st Grade Math

» Unit:

Problem Solving Addition

Big Idea:Students can recite doubles, this lesson puts the doubles+1 strategy into action!

Carrie Clark

Rural Env.

18 Resources

20 Favorites

18 Resources

20 Favorites

Using the Number Grid to Add or Subtract Ten

1st Grade Math

» Unit:

The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

Big Idea:The Number Grid Challenge. Students will play a game that requires them to add or subtract ten from a number using the number grid. They will record their results using standard notation.

Thomas Young

Suburban Env.

20 Resources

14 Favorites

20 Resources

14 Favorites

Counting Back

1st Grade Math

» Unit:

Single Digit Addition and Subtraction

Big Idea:Smack down! In this lesson students will learn how to count back to subtract.

Lisa Murdock

Urban Env.

12 Resources

10 Favorites

12 Resources

10 Favorites

Addition and Subtraction Carnival

1st Grade Math

» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:So many things to do and so little time to do them in. Students will have the opportunity to challenge their addition and subtraction skills through a variety of activity choices.

Thomas Young

Suburban Env.

19 Resources

11 Favorites

19 Resources

11 Favorites

Using 3 or More Addends to Make a Meal

1st Grade Math

» Unit:

Problem Solving Addition

Big Idea:Using the theme of a very YUMMY Thanksgiving meal, students will plan their own meal and figure out the cost of it.

Carrie Clark

Rural Env.

14 Resources

12 Favorites

14 Resources

12 Favorites

Crayon Box Combinations

1st Grade Math

» Unit:

Properties of Addition and Subtraction

Big Idea:Students think deeply about how to make 9 using different combinations of red and blue crayons. This builds number sense and sets them up for later math fact fluency!

Amanda Cole

Urban Env.

15 Resources

6 Favorites

15 Resources

6 Favorites

Peas and Carrots...Carrots and Peas

1st Grade Math

» Unit:

Properties of Addition and Subtraction

Big Idea:Students "sweat" in this difficult task where they work to find all of the combinations for 7 and 8.

Amanda Cole

Urban Env.

15 Resources

9 Favorites

15 Resources

9 Favorites

Skiing or Boarding?

1st Grade Math

» Unit:

Data and Analysis

Big Idea:Next week marks the start of our Skiing and Snowboarding program at the Waitsfield School. Today the students will find out what each classmate would prefer to do.

Thomas Young

Suburban Env.

22 Resources

22 Resources

Pick Your Ten

1st Grade Math

» Unit:

The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

Big Idea:Score this party a 10! Students will join in a 10 celebration as they choose from their favorite unit activities .

Thomas Young

Suburban Env.

14 Resources

3 Favorites

14 Resources

3 Favorites

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 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).