Second Grade Online Math Games
Common Core Math Domains:
Clusters with the Standards

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*Operations and Algebraic Thinking 2.OA


Represent and solve problems involving addition and subtraction.
2.OA.1 Use addition and subtraction within 100 to solve one and two step word problems.


Add and subtract within 20.
2.OA.2 Fluently add and subtract within 20 using mental strategies.


Work with equal groups of objects to gain foundations for multiplication.
2.OA.3 Determine whether a group of objects (up to 20) has an odd or even number of members.
2.OA.4 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.


*Number and Operations in Base Ten 2.NBT


Understand place value.
2.NBT.1 Understand that the three digits of a threedigit number represent amounts of hundreds, tens, and ones.
2.NBT.1a 100 can be thought of as a bundle of ten tenscalled a “hundred.”
2.NBT.1b The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).
2.NBT.2 Count within 1000; skipcount by 5s, 10s, and 100s.
2.NBT.3 Read and write numbers to 1000, number names, and expanded form.
2.NBT.4 Compare two threedigit numbers based on meanings of the hundreds, tens, and ones digits, using >,=, and < symbols to record the results of comparisons.


Use place value understanding and properties of operations to add and subtract.
2.NBT.5 Fluently add and subtract within 100 using strategies.
2.NBT.6 Add up to four twodigit numbers using strategies based on place value and properties of operations.
2.NBT.7 Add within 1000, using concrete models or drawings and strategies based on place value; relate the strategy to a written method and explain the reasoning used.
2.NBT.8 Mentally add 10 or 100 to a given number 100900, and mentally subtract 10 or 100 from a given number 100900.
2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.


*Measurement and Data 2.MD


Measure and estimate lengths in standard units.
2.MD.1 Measure the length of an object by selecting and using appropriate tools.
2.MD.2 Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.
2.MD.3 Estimate lengths using units of inches, feet, centimeters, and meters.
2.MD.4 Measure to determine how much longer one object is than another.


Relate addition and subtraction to length.
2.MD.5 Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units.
2.MD.6 Represent whole numbers as lengths from 0 on a number line diagram.


Work with time and money.
2.MD.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
2.MD.8 Solve word problems involving dollar bills, quarter, dimes, nickels, and pennies, using $ and ¢ symbols appropriately,
Represent and Interpret data.
2.MD.9 Generate measurement data by measuring lengths of several objects, or by making repeated measurements of the same object. Show the measurements by making a line plot.
2.MD.10 Draw a picture graph and bar graph to represent a data set with up to four categories. Solve simple puttogether, takeapart, and compare problems using information presented in a bar graph.


*Geometry 2.G


Reason with shapes and their attributes.
2.G.1 Recognize and draw shapes having specified attributes. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.
2.G.2. Partition a rectangle into rows and columns of samesize squares and count to find the total number of them.
2.G.3 Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc.,
