Grade 2 Math TEKS 2.4A:Addition and Subtraction Fluency

Learning Target: I can use strategies such as counting on and number lines to help solve addition problems.

Focuses On:

• applying the strategy of counting on
• utilizing the number line to add

Builds On:

1.3F:

Generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20

Next Level:

3.4A:

Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction

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This lesson is designed to give students practice with addition within 20.

Students will practice counting on in the first instructional block. Using the bigger number as a starting point, students will count on versus starting from 1. Pictorial models are built into the activities to support student understanding.

The second instructional block focuses on using the number line as a way to add numbers. Students will start at the bigger number and make jumps in order to get to the sum. Similar to the first instructional block, pictorial models of number lines are built into the activities as a way to support student thinking.

Learning Target: I can use strategies such as counting back and number lines to solve subtraction problems.

Focuses On:

• applying the strategy of counting back
• utilizing the number line to subtract

Builds On:

1.3F:

Generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20

Next Level:

3.4A:

Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction

Read More:

This lesson is designed to give students practice with subtraction within 20.

Students will practice counting back in the first instructional block. Using the bigger number as a starting point, students will count back with a focus on being precise. Pictorial models are built into the activities to support student understanding.

The second instructional block focuses on using the number line as a way to subtract numbers. Students will start at the bigger number and make jumps in order to get to the difference. Similar to the first instructional block, pictorial models of number lines are built into the activities as a way to support student thinking.

Learning Target: I can use ten frames and number bonds to make tens to help me solve addition problems.

Focuses On:

• using a ten frame in order to make ten and count on
• breaking numbers into smaller numbers using number bonds

Builds On:

1.3F:

Generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20

Next Level:

3.4A:

Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction

Read More:

This lesson is designed to give students practice with making tens as they work towards fluency with their basic facts within 20.

In the first instructional block, students will practice using a ten frame. By filling a ten frame and then looking to see how many are left over, students are anchoring their understanding of addition within the base ten system. Pictorial models are built into this block so students can visualize how making a ten and then counting on is a strategy that they can use.

The second instructional block focuses on breaking numbers into smaller numbers using number bonds. Students will practice breaking numbers into friendly smaller numbers to help make ten. Similar to the first instructional block, pictorial models of number bonds are built into the lesson. Students will visualize how an addend can be broken into smaller numbers in order to make ten and count on.