Washington Math Standards - 1st Grade

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1.1. Core Content: Whole number relationships
1.1.A Count by ones forward and backward from 1 to 120, starting at any number, and count by twos, fives, and tens to 100.
1.1.B Name the number that is one less or one more than any number given verbally up to 120. (Requires outside materials )
1.1.C Read aloud numerals from 0 to 1,000. (Requires outside materials )
1.1.D Order objects or events using ordinal numbers.
1.1.E Write, compare, and order numbers to 120.
1.1.F Fluently compose and decompose numbers to 10.
1.1.G Group numbers into tens and ones in more than one way. (Counting Squares )
1.1.H Group and count objects by tens, fives, and twos. (Skip Counting )
1.1.I Classify a number as odd or even and demonstrate that it is odd or even. (Odd or Even )

1.2. Core Content: Addition and subtraction
1.2.A Connect physical and pictorial representations to addition and subtraction equations.
1.2.B Use the equal sign (=) and the word equals to indicate that two expressions are equivalent.
1.2.C Represent addition and subtraction on the number line.
1.2.D Demonstrate the inverse relationship between addition and subtraction by undoing an addition problem with subtraction and vice versa. (Inverse Equations 1 )
1.2.E Add three or more one-digit numbers using the commutative and associative properties of addition. (Addition Grouping , Associative Property 1 , Commutative Property 1 )
1.2.F Apply and explain strategies to compute addition facts and related subtraction facts for sums to 18. (Fast Addition , Fast Addition Reverse , Fast Subtraction )
1.2.G Quickly recall addition facts and related subtraction facts for sums equal to 10. (Fast Addition , Fast Addition Reverse , Fast Subtraction )
1.2.H Solve and create word problems that match addition or subtraction equations. (Basic Word Problems )
1.2.I Recognize, extend, and create number patterns. (Patterns: Numbers )

1.3. Core Content: Geometric attributes
1.3.A Compare and sort a variety of two- and three-dimensional figures according to their geometric attributes. (Geometric Shapes )
1.3.B Identify and name two-dimensional figures, including those in real-world contexts, regardless of size or orientation.
1.3.C Combine known shapes to create shapes and divide known shapes into other shapes.

1.4. Core Content: Concepts of measurement
1.4.A Recognize that objects used to measure an attribute (length, weight, capacity) must be consistent in size.
1.4.B Use a variety of non-standard units to measure length.
1.4.C Compare lengths using the transitive property.
1.4.D Use non-standard units to compare objects according to their capacities or weights.
1.4.E Describe the connection between the size of the measurement unit and the number of units needed to measure something.
1.4.F Name the days of the week and the months of the year, and use a calendar to determine a day or month.

1.5. Additional Key Content
1.5.A Represent data using tallies, tables, picture graphs, and bar-type graphs.
1.5.B Ask and answer comparison questions about data. (Tally and Pictographs , Bar Graphs )

1.6. Core Processes: Reasoning, problem solving, and communication (Basic Word Problems )
1.6.A Identify the question(s) asked in a problem.
1.6.B Identify the given information that can be used to solve a problem.
1.6.C Recognize when additional information is required to solve a problem.
1.6.D Select from a variety of problem-solving strategies and use one or more strategies to solve a problem.
1.6.E Answer the question(s) asked in a problem.
1.6.F Identify the answer(s) to the question(s) in a problem.
1.6.G Describe how a problem was solved.
1.6.H Determine whether a solution to a problem is reasonable.

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