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Add Decimal Numbers

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Add Decimal Numbers

TEKS Math: 4.4.A

(A) Add and subtract whole numbers and decimals to the hundredths place using the standard algorithm

AU Math: ACMNA128

(Y6) Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers (ACMNA128)

CCSS Math: 5.NBT.7

5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

This number sense lesson focuses on adding decimal numbers. The lesson includes research-based strategies and strategic questions that prepare students for assessments. In this lesson, students identify the decimal numbers being added, is necessary. Then, they line up the decimal numbers by place value, making the decimal points line up. Finally, they add the decimal numbers, line up the decimal point in the sum, and interpret the sum. In addition to the lesson, there are eight pages of Independent Practice and Periodic Review with questions modeled after current adaptive testing items and six flashcards on lining up the decimal numbers.

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Standard Alignments:

TEKS Math: 4.4.A

(A) Add and subtract whole numbers and decimals to the hundredths place using the standard algorithm

AU Math: ACMNA128

(Y6) Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers (ACMNA128)

CCSS Math: 5.NBT.7

5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.


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