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Longview ISD 2-3 Mathematics - Week 10 G r a d e U n i t 2 4 3 2 Title and Unit Overview Number Pairs Students will generate paired numbers based on real-life situations and identify patterns to extend the list. Addition, Subtraction, and Estimation The student adds and subtracts to solve meaningful problems involving whole numbers and determines appropriate times to estimate Page 1 Time Frame: 8 days-2 Weeks TAKS and TEKS TAKS: 2 TEKS: 2.6A, 2.6B, 2.6C 18 Days 3 Weeks TAKS: 1, 3, 6 TEKS: 3.3A, 3.3B, 3.5A, 3.5B, 3.10 3.15A, 3.15B, 3.15D Enduring Understandings Essential Questions Conclusions can be drawn by looking at patterns on hundreds chart and number lines. A pattern is something that happens over and over or it can grow. What is a pattern? How are predictions made by looking at a hundreds chart and number line? What do the best problem solvers do? How are increasing and repeating patterns different? Addition and subtraction are used to solve meaningful problems involving whole numbers. Estimation can be used to determine reasonable results. Students will use models and pictures to clarify the problem solving process. What is the best strategy that can be used to solve meaningful problems? What kind of problem is it? What do the best problem solvers do? What does it mean to reason mathematically? When is estimation better than counting and when not? Mathematics Facts Recognize and extend number patterns Recall and apply basic addition facts (sums to 18). Find and name patterns on a 100’s chart Locate and name points on a number line Understand that finding patterns can lead them to solving problems Relationships and/or Connections that should emerge Patterns are all around us such as in reading, nature, and music. Vocabulary add addend basic facts difference equal fact family minus number line number sentence numeral part plus related solution sentence solve strategies subtract sum together total turn around fact whole Add to combine two parts to find the whole. Subtract to compare. Knowing the whole amount and one part, subtract to find the other part. In addition, switching the addends results in the same sum. An estimate is a number closer to the exact amount. There are several problem solving plans which can be used such as: a. Draw a picture b. Guess and check c. Look for a pattern d. Act it out e. Make a table or chart f. Work backward g. Write a number sentence Estimation is changing a number so that it is easy to work with, but still close enough to use. Estimation is a number close to the exact amount. Add to join one amount to another amount. Add to combine two parts to find the whole amount. Subtract to take away—the answer tells how much is left. Subtract to compare. Knowing the whole amount and one part, subtraction can be used to find the other part. Subtraction is finding the missing addend in an addition sentence. sumar umandos sumas basicas diferencia Igual familia de operaciones menos recta numerica oracion numerica numerico parte mas relacionado solucion Text Resources Math Learning Center Volume 1; Volume 2 Investigations: Putting Together and Taking Apart; Investigation 2 Coins, Coupons and Combinations; Investigation 2 Coins, Coupons and Combinations Investigation 2, 4 Homework Extension Pg.149 SBG Ch. 3 resolver estrategias substraccion, restar la suma juntos, unir total propiedad comutativa entero Investigations: addend difference estimate facts sum sumandos diferencia estimar datos suma Combining and Comparing Investigation 3 Session 1, 2, 3 Investigation 4 Session 1, 3, 4 Investigation 5 Session 1 Session 2, 3 Combining and Comparing Investigations: Sessions 1-2: Student Sheets 5-9 Sessions 3-4: Student Sheets 10-14 Session 2-3: Student Sheets 15-16 Page 2