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Subtract Two-Digit Numbers (With Decomposing)

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Subtract Two-Digit Numbers (With Decomposing)

TEKS Math: 2.4.B

(B) Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations

AU Math: ACMNA030

(Y2) Solve simple addition and subtraction problems using a range of efficient mental and written strategies (ACMNA030)

CCSS Math: 2.NBT.5

2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

This number sense lesson focuses on subtracting numbers (two digits long). The lesson includes research-based strategies and questions that help prepare students for assessments. In this lesson, students determine if regrouping is needed. Then, they subtract digits in the ones place, and in the tens place. Finally, students read the problem and sum aloud. In addition to the lesson, there are "lining up subtraction" flashcards along with seven pages of Independent Practice and review with questions modeled after current adaptive testing items.

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Standard Alignments:

TEKS Math: 2.4.B

(B) Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations

AU Math: ACMNA030

(Y2) Solve simple addition and subtraction problems using a range of efficient mental and written strategies (ACMNA030)

CCSS Math: 2.NBT.5

2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.


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