IXL Math - Washington second-grade math standards

IXL Math

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Skills available for Washington second-grade math standards

Washington math standards: 2008 Washington Standards (Grades K-6)

Washington math standards: 2006 Washington Grade Level Expectations (Grades K-5)

Standards are in black and IXL math skills are in blue. Hold your mouse over the name of a skill to view a sample problem. Click on the name of a skill to practice that skill.

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2.1 Place value and the base ten system

2.1.A Count by tens or hundreds forward and backward from 1 to 1,000, starting at any number.
2.1.B Connect place value models with their numerical equivalents to 1,000.
2.1.C Identify the ones, tens, and hundreds place in a number and the digits occupying them.
- Counting and number patterns: Hundreds chart (Second grade - A.5)
- Place values: Identify the digit in the ones, tens, hundreds, or thousands place (Second grade - M.15)
2.1.D Write three-digit numbers in expanded form.
- Place values: Convert from expanded form - up to hundreds (Second grade - M.13)
- Place values: Convert from expanded form - up to thousands (Second grade - M.14)
2.1.E Group three-digit numbers into hundreds, tens, and ones in more than one way.
- Place values: Regrouping tens and ones I (Second grade - M.7)
- Place values: Regrouping tens and ones II (Second grade - M.8)
2.1.F Compare and order numbers from 0 to 1,000.

2.2 Addition and subtraction

2.2.A Quickly recall basic addition facts and related subtraction facts for sums through 20.
2.2.B Solve addition and subtraction word problems that involve joining, separating, and comparing and verify the solution.
2.2.C Add and subtract two-digit numbers efficiently and accurately using a procedure that works with all two-digit numbers and explain why the procedure works.
2.2.D Add and subtract two-digit numbers mentally and explain the strategies used.
2.2.E Estimate sums and differences.
- Estimation and rounding: Estimate sums (Second grade - N.5)
2.2.F Create and state a rule for patterns that can be generated by addition and extend the pattern.
2.2.G Solve equations in which the unknown number appears in a variety of positions.
2.2.H Name each standard U.S. coin, write its value using the $ sign and the ¢ sign, and name combinations of other coins with the same total value.
2.2.I Determine the value of a collection of coins totaling less than $1.00.

2.3 Measurement

2.3.A Identify objects that represent or approximate standard units and use them to measure length.
- Measurement: Which unit of length is appropriate? (Second grade - S.2)
2.3.B Estimate length using metric and U.S. customary units.
- Measurement: Which unit of length is appropriate? (Second grade - S.2)
2.3.C Measure length to the nearest whole unit in both metric and U.S. customary units.
2.3.D Describe the relative size among minutes, hours, days, weeks, months, and years.
2.3.E Use both analog and digital clocks to tell time to the minute.

2.4 Additional Key Content

2.4.A Solve problems involving properties of two- and three-dimensional figures.
2.4.B Collect, organize, represent, and interpret data in bar graphs and picture graphs.
2.4.C Model and describe multiplication situations in which sets of equal size are joined.
2.4.D Model and describe division situations in which sets are separated into equal parts.
- Division: Divisors and quotients up to 5 (Second grade - X.1)
- Division: Divisors and quotients up to 10 (Second grade - X.2)
2.4.E Interpret a fraction as a number of equal parts of a whole or a set.

2.5 Reasoning, problem solving, and communication

2.5.A Identify the question(s) asked in a problem and any other questions that need to be answered in order to solve the problem.
2.5.B Identify the given information that can be used to solve a problem.
2.5.C Recognize when additional information is required to solve a problem.
2.5.D Select from a variety of problem-solving strategies and use one or more strategies to solve a problem.
2.5.E Identify the answer(s) to the question(s) in a problem.
2.5.F Describe how a problem was solved.
- Properties: Addition, subtraction, multiplication, and division terms (Second grade - K.4)
2.5.G Determine whether a solution to a problem is reasonable.
- Estimation and rounding: Estimate to the nearest ten (Second grade - N.1)