Math: Introducing 3-Digit Place Value

Suggested Time Frame: 18 Instructional Days

        

Focus TEKS

Representing Numbers up to 999

  • 2.2B use standard, word, and expanded forms to represent numbers up to 1,200 [999 in this unit]
    • 2.2A use concrete and pictorial models to compose and decompose numbers up to 1,200 [999 in this unit] in more than one way as a sum of so many thousands, hundreds, tens, and ones
    • 2.2E locate the position of a given whole number on an open number line
    • 2.2F name the whole number that corresponds to a specific point on a number line
    • 2.7B use an understanding of place value to determine the number that is 10 or 100 more or less than a given number up to 1,200 [999 in this unit]

Comparing Numbers up to 999

  • 2.2D use place value to compare and order whole numbers up to 1,200 [999 in this unit] using comparative language, numbers, and symbols (>, <, or =)
    • 2.2C generate a number that is greater than or less than a given whole number up to 1,200 [999 in this unit]
Computational Fluency TEKS

Two-Digit Addition and Subtraction

  • 2.4B 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

Skip Counting – Coins

  • 2.5A determine the value of a collection of coins up to one dollar [pennies, nickels, and dimes only in this unit]
    • 2.5B use the cent symbol, dollar sign, and the decimal point to name the value of a collection of coins
Spiral Review TEKS

Measure Length Using Standard Units

  • 2.9A find the length of objects using concrete models for standard units of length
  • 2.9B describe the inverse relationship between the size of the unit and the number of units needed to equal the length of an object
  • 2.9C represent whole numbers as distances from any given location on a number line
  • 2.9D determine the length of an object to the nearest marked unit using rulers, yardsticks, meter sticks, or measuring tapes

Solve Problems Involving Length

  • 2.9E determine a solution to a problem involving length, including estimating lengths
  • 2.4C solve one-step and multi-step [length] word problems involving addition and subtraction within 1,000 [100 in this unit] using a variety of strategies based on place value, including algorithms

Measure Time

  • 2.9G read and write time to the nearest one-minute increment using analog and digital clocks and distinguish between a.m. and p.m.