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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).

3 Addends

1st Grade Math

Â» Unit:

Problem Solving Addition

Big Idea:When we add 3 addends we can look for a friendly combination to make our work easier

Adding and Subtracting Multiples of Ten

1st Grade Math

Â» 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.

Equal or Not?

1st Grade Math

Â» 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.

Identify Related Facts - Day 1 of 2

1st Grade Math

Â» 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.

Use Addition to Check Subtraction

1st Grade Math

Â» 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.

How Many Dots?

1st Grade Math

Â» 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.

Explain a double

1st Grade Math

Â» Unit:

Problem Solving Addition

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

Using the Number Grid to Add or Subtract Ten

1st Grade Math

Â» 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.

Counting Back

1st Grade Math

Â» Unit:

Single Digit Addition and Subtraction

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

Addition and Subtraction Carnival

1st Grade Math

Â» 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.

Using 3 or More Addends to Make a Meal

1st Grade Math

Â» 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.

Crayon Box Combinations

1st Grade Math

Â» 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!

Peas and Carrots...Carrots and Peas

1st Grade Math

Â» 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.

Skiing or Boarding?

1st Grade Math

Â» 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.

Pick Your Ten

1st Grade Math

Â» 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 .

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).