Operations and Algebraic Thinking Second Grade. Cindy Foubert, Jeannette Robinson, Haley Snyder, Kristin Finney and Andrelyn Alexander. Operations and Algebraic Thinking Cluster Headings. Cluster 1 Represent and Solve Problems Involving Addition and Subtraction Cluster 2
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Cindy Foubert, Jeannette Robinson, Haley Snyder,
Kristin Finney and Andrelyn Alexander
What if a second grade student did not grasp the standard 2.0A.1
Which future standards would be affected?
Look at the Zimba Chart!
Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
“Students need to solve problems where key words are contrary to such thinking.” (Common Core Flip Book)
Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.
Use place value understanding and properties of operations to add and subtract within 20
Use multiplication and division within 100 to solve word problems in situations involving equal, arrays, and measurement quantities, e.g. by using drawings and equations with a symbol for the unknown number to represent the problem.
Understand the relationship between numbers and quantities; connect counting to cardinality.
Identify whether the number of objects in one group is greater than, less than, or equal to the number of objects in another group e.g. using matching and counting strategies
Relates doubles additions up to 20 to the concept of odd and even numbers and to counting by 2s (the easiest count-by in Level 2) by pairing and counting by 2s the things in each addend.
Work With Equal Groups of Objects to Gain Foundations for Multiplication
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
Haley already has 10 stickers. Now her goal is to collect 20 in all. She got 4 more on Monday and 4 again on Tuesday.