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Estimate the Sum of Decimals (Hundredths Place)

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Estimate the Sum of Decimals (Hundredths Place)

TEKS Math: 5.3.A

(A) Estimate to determine solutions to mathematical and real-world problems involving addition, subtraction, multiplication, or division

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 estimating the sum of decimals to two places. The lesson includes research-based strategies and questions that help prepare students for assessments. In this lesson, students round all numbers to the nearest whole number, and rewrite the addition problem using the rounded values. Then, they add the rounded numbers. In addition to the lesson, there are four pages of Independent Practice and review with questions modeled after current adaptive testing items.

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Standard Alignments:

TEKS Math: 5.3.A

(A) Estimate to determine solutions to mathematical and real-world problems involving addition, subtraction, multiplication, or division

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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