Videos and solutions to help Grade 1 students learn how to practice to visualize and solve doubles and doubles plus 1 with 5-group cards.

Common Core Standards: 1.OA.6

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Common Core For Grade 1

**What is Double Plus 1?**

Double Plus 1 is an addition strategy. When one addend is one more than the other addend, we double the smaller addend and add one to get the answer. The double plus one strategy requires you to know how to double a number mentally and then add one. Scroll down the page for Doubles plus 1 worksheet, lessons, and a song to help you learn the Doubles.

### New York State Common Core Math Grade 1, Module 1, Lesson 21

Module 1 Topic F: Development of Addition Fluency Within 10

Lesson 21 Homework

1. Draw the 5-group card to show a double. Write the number sentence to match the cards.

2. Fill in the 5-group cards in order from least to greatest, double the number, and write the number sentences.

4. Match the top cards to the bottom cards to show doubles plus 1.

**How to use the doubles plus 1 addition strategy?**

**"How to add doubles" song**

1+1=2

2+2=4

3+3=6

4+4=8

5+5=10

6+6=12

7+7=14

8+8=16

9+9=18

10+10=20

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

Common Core Standards: 1.OA.6

Related Topics:

Lesson Plans and Worksheets for Grade 1

Lesson Plans and Worksheets for all Grades

More Lessons for Grade 1

Common Core For Grade 1

Double Plus 1 is an addition strategy. When one addend is one more than the other addend, we double the smaller addend and add one to get the answer. The double plus one strategy requires you to know how to double a number mentally and then add one. Scroll down the page for Doubles plus 1 worksheet, lessons, and a song to help you learn the Doubles.

Lesson 21 Homework

1. Draw the 5-group card to show a double. Write the number sentence to match the cards.

2. Fill in the 5-group cards in order from least to greatest, double the number, and write the number sentences.

4. Match the top cards to the bottom cards to show doubles plus 1.

1+1=2

2+2=4

3+3=6

4+4=8

5+5=10

6+6=12

7+7=14

8+8=16

9+9=18

10+10=20

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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