Common Core State Standards Math
Math Standards: Operations and Algebraic Thinking
2.OA.1 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.
2.OA.2 Fluently add and subtract within 20 using mental strategies. By
the end of Grade 2, know from memory all sums of two one-digit numbers.
2.OA.3 Determine whether a group of objects (up to 20) has an odd or
even number of members, e.g., by pairing objects or counting them by 2s;
write an equation to express an even number as a sum of two equal addends.
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.1 Understand that the three digits of a three-digit number represent amounts of hundreds, ten, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:100 can be thought of as a bundle of ten tens - called a “hundred.”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.3 Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
2.NBT.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
2.NBT.6 Add up to four two-digit numbers using strategies based on place value and properties of operations.
2.NBT.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, ten and tens, ones, and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
2.NBT.8 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.
Measurement and Data
2.MD.1 Measure the length of an object by selecting and using
appropriate tools such as rulers, yardsticks, meter sticks, and measuring
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, expressing the length difference in terms of a standard length unit.
2.MD.5 Use addition and subtraction within 100 to solve word problems
involving lengths that are given in the same units, e.g., by using drawings
(such as drawings of rulers) and equations with a symbol for the unknown
number to represent the problem.
2.MD.6 Represent whole numbers as lengths from 0 on a number line
diagram with equally spaced points corresponding to the numbers 0, 1, 2, ….,
and represent whole-number sums and differences within 100 on a number
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, quarters, dimes,
nickels, and pennies, using $ and ¢ symbols appropriately. Example: If you
have 2 dimes and 3 pennies, how many cents do you have?
2.MD.9 Generate measurement data by measuring lengths of several
objects to the nearest whole unit, or by making repeated measurements of the
same object. Show the measurements by making a line plot, where the
horizontal scale is marked off in whole-number units.
2.MD.10 Draw a picture graphs and a bar graph (with single-unit scale) to
represent a data set with up to four categories. Solve simple put-together,
take-apart, and compare problems using information presented in a bar
2.G.1 Recognize and draw shapes having specified attributes, such as
a given number of angles or a given number of equal faces. Identify triangles,
quadrilaterals, pentagons, hexagons, and cubes.
2.G.2 Partition a rectangle into rows and columns of same-size
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., and describe the whole as two halves, three thirds, four fourths.
Recognize that equal shares of identical wholes need not have the same