IXL Math - Missouri second-grade math standards

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Missouri

Skills available for Missouri second-grade math standards

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2.1 Number and Operations

2.1.1 Understand numbers, ways of representing numbers, relationships among numbers, and number systems
2.1.1.A Read, write and compare numbers
2.1.1.A.1 read, write and compare whole numbers less than 100
2.1.1.B Represent and use rational numbers
2.1.1.B.1 recognize 1/2, 1/3 and 1/4 of a shape
2.1.1.C Compose and decompose numbers
2.1.1.C.1 compose or decompose numbers by using a variety of strategies, such as using known facts, tens or landmark numbers to solve problems
2.1.1.D Classify and describe numeric relationships
2.1.1.D.1 skip count by 2s, 5s and 10s
2.1.2 Understand meanings of operations and how they relate to one another
2.1.2.A Represent operations
2.1.2.A.1 represent a given situation involving addition or subtraction
- Subtraction: Subtraction with pictures - numbers up to 10 (First grade - D.1)
2.1.3 Compute fluently and make reasonable estimates
2.1.3.A Describe or represent mental strategies
2.1.3.A.1 describe or notate the mental strategy used to compute addition or subtraction of whole numbers, including 2-digit numbers
2.1.3.B Develop and demonstrate fluency
2.1.3.B.1 demonstrate fluency with basic number relationships of addition and subtraction for sums up to 20
2.1.3.C Compute problems
2.1.3.C.1 apply and describe the strategy used to compute 2-digit addition or subtraction problems

2.2 Algebraic Relationships

2.2.1 Understand patterns, relations, and functions
2.2.1.A Recognize and extend patterns
2.2.1.A.1 describe and extend simple numeric patterns and change from one representation to another
- Counting and number patterns: Counting patterns - up to 100 (Second grade - A.3)
2.2.1.B Create and analyze patterns
2.2.1.B.1 describe how simple growing patterns are generated
2.2.1.C Classify objects and representations
2.2.1.C.1 classify objects by size, number or other attributes
2.2.2 Represent and analyze mathematical situations and structures using algebraic symbols
2.2.2.A Represent mathematical situations
2.2.2.A.1 represent a mathematical situation as an expression or number sentence
2.2.2.B Describe and use mathematical manipulation
2.2.2.B.1 investigate commutative principle with whole numbers
- Properties: Solve inequalities using addition and subtraction shortcuts (Second grade - K.5)
2.2.3 Use mathematical models to represent and understand quantitative relationships
2.2.3.A Use mathematical models
2.2.3.A.1 model situations that involve addition and subtraction of whole numbers, using pictures, objects or symbols
- Addition - one digit: Addition with pictures - sums to 20 (Second grade - E.5)
- Subtraction - one digit: Subtraction with pictures (Second grade - F.5)
2.2.4 Analyze change in various contexts
2.2.4.A Analyze change
2.2.4.A.1 describe qualitative change, such as students growing taller

2.3 Geometric and Spatial Relationships

2.3.1 Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships
2.3.1.A Describe and use geometric relationships
2.3.1.A.1 describe attributes and parts of 2- and 3-dimensional shapes (circle, triangle, trapezoid, rectangle, rhombus, sphere, rectangular prism, cylinder, pyramid)
2.3.2 Specify locations and describe spatial relationships using coordinate geometry and other representational systems
2.3.2.A Use coordinate systems
2.3.2.A.1 find and name locations with simple relationships on a map (coordinate system)
- Data and graphs: Coordinate graphs (Second grade - R.1)
2.3.3 Apply transformations and use symmetry to analyze mathematical situations
2.3.3.A Use transformations on objects
2.3.3.A.1 use manipulatives to model flips
- Geometry: Flip, turn, and slide (Second grade - T.6)
2.3.3.C Use symmetry
2.3.3.C.1 recognize and create shapes that have symmetry
- Geometry: Symmetry (Second grade - T.4)
2.3.4 Use visualization, spatial reasoning and geometric modeling to solve problems
2.3.4.A Recognize and draw three-dimensional representations
2.3.4.A.1 recognize and represent shapes from different perspectives

2.4 Measurement

2.4.1 Understand measurable attributes of objects and the units, systems and processes of measurement
2.4.1.A Determine unit of measurement
2.4.1.A.1 select an appropriate unit and tool for the attribute being measured
- Time: Choose the appropriate time units (Second grade - Q.11)
- Measurement: Choose the appropriate measuring tool (Second grade - S.8)
2.4.1.C Tell and use units of time
2.4.1.C.1 tell time to the nearest half hour
2.4.1.D Count and compute money
2.4.1.D.1 count money to a dollar
2.4.2 Apply appropriate techniques, tools and formulas to determine measurements
2.4.2.A Use standard or non-standard measurement
2.4.2.A.1 use tools to measure (size, temperature, time, weight) to the nearest inch, centimeter, degree, hour and pound

2.5 Data and Probability

2.5.1 Formulate questions that can be addressed with data and collect, organize and display relevant data to answer them
2.5.1.A Formulate questions
2.5.1.A.1 pose questions and gather data about themselves and their surroundings
- Probability and statistics: More, less, and equally likely (Second grade - V.1)
- Probability and statistics: Certain, probable, unlikely, and impossible (Second grade - V.2)
2.5.1.B Classify and organize data
2.5.1.B.1 sort and classify items according to their attributes and organize data about the items
- Data and graphs: Interpret Venn diagrams (Second grade - R.8)
2.5.1.C Represent and interpret data
2.5.1.C.1 represent data using pictures and bar graphs