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• Math (TAG): Addition, Subtraction, Estimation, and Rounding

# Math (TAG): Addition, Subtraction, Estimation, and Rounding

### Suggested Time Frame: 15 Instructional Days

##### Focus TEKS

Addition and Subtraction – Problem Solving

• 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 R
• 4.4A  Add and subtract whole numbers and decimals to the hundredths place using the standard algorithm R

Addition and Subtraction Estimation and Rounding

• 3.4B  Round to the nearest 10 or 100 or use compatible numbers, to estimate solutions to addition and subtraction problems S
• 3.2C represent a number on a number line as being between two consecutive multiples of 10; 100; 1,000; or 10,000 and use words to describe relative size of numbers in order to round whole numbers; S
• 4.2D round whole numbers to a given place value through the hundred thousands place S
• 4.4G  round to the nearest 10, 100, or 1,000 or use compatible numbers to estimate solutions involving whole numbers S

Addition and Subtraction Representing

• 3.5A  Represent one- and two-step problems involving addition and subtraction of whole numbers  to 1,000   using pictorial models, number lines, and equations R
##### Computational Fluency TEKS

Multiplication and Division Facts – Doubling Multiplication Strategy

• 3.4F  Recall facts to multiply up to ten by ten with automaticity and recall the corresponding division facts [focus on 2s, 4s, and 8s facts with the Doubling Multiplication/Division Fact Strategy] – S
##### Spiral Review TEKS

Review Place Value Concepts – Whole Numbers to 100,000 and Decimals to the hundredths

• 3.2A  Compose and decompose numbers up to 100,000  as a sum of so many ten thousands, so many  thousands, so many hundreds, so many tens, and so many ones using objects, pictorial models, and numbers, including expanded notation as appropriate R
• 4.2A  interpret the value of each place-value position as 10 times the position to the right and as one-tenth the value of the place to its left S
• 3.2B  Describe the mathematical relationships found in the base-10 place value system through the hundred thousands place S
• 3.2C  Represent a number on a number line as being between two consecutive multiples of 10; 100; 1,000; or 10,000 and use words to describe relative size of numbers in order to round whole numbers – S
• 4.2H  determine the corresponding decimal to the tenths or hundredths place of a specified point on a number line S
• 3.2D  Compare and order whole numbers up to 100,000 and represent comparisons using the symbols >, <, or = R
• 4.2F  Compare and order decimals using concrete and visual models to the hundredths S
• 3.4C  Determine the value of a collection of coins and bills S
• 4.2E  Represent decimals, including tenths and hundredths, using concrete and visual models and money S