1.OA.C.6

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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).

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## 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).

106 Lesson(s)

### 3 Addends

1st Grade Math »
Unit: Problem Solving Addition

1st Grade Math »
Unit: Problem Solving Addition

### 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

1st Grade Math »
Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

### Equal or Not?

1st Grade Math »
Unit: Understanding Equality

1st Grade Math »
Unit: Understanding Equality

### Use Addition to Check Subtraction

1st Grade Math »
Unit: Single Digit Addition and Subtraction

1st Grade Math »
Unit: Single Digit Addition and Subtraction

### Identify Related Facts - Day 1 of 2

1st Grade Math »
Unit: Single Digit Addition and Subtraction

1st Grade Math »
Unit: Single Digit Addition and Subtraction

### How Many Dots?

1st Grade Math »
Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

1st Grade Math »
Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

### Explain a double

1st Grade Math »
Unit: Problem Solving Addition

1st Grade Math »
Unit: Problem Solving Addition

### 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

1st Grade Math »
Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less

### Addition and Subtraction Carnival

1st Grade Math »
Unit: Working with Numbers, Operations, and Story Problems

1st Grade Math »
Unit: Working with Numbers, Operations, and Story Problems

### Using 3 or More Addends to Make a Meal

1st Grade Math »
Unit: Problem Solving Addition

1st Grade Math »
Unit: Problem Solving Addition

### Counting Back

1st Grade Math »
Unit: Single Digit Addition and Subtraction

1st Grade Math »
Unit: Single Digit Addition and Subtraction

### Peas and Carrots...Carrots and Peas

1st Grade Math »
Unit: Properties of Addition and Subtraction

1st Grade Math »
Unit: Properties of Addition and Subtraction

### Crayon Box Combinations

1st Grade Math »
Unit: Properties of Addition and Subtraction

1st Grade Math »
Unit: Properties of Addition and Subtraction

### Skiing or Boarding?

1st Grade Math »
Unit: Data and Analysis

1st Grade Math »
Unit: Data and Analysis

### Doubles & Doubles +1 Practice

1st Grade Math »
Unit: Problem Solving Addition

1st Grade Math »
Unit: Problem Solving Addition

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