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2Grade 2 Standards
Top Mathematicians
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Geometry
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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.
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2.1565
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2.1575
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2.1585
-
2.1595
-
2.1605
-
2.1615
-
2.1625
-
2.1635
-
2.1645
-
2.1655
-
2.1665
-
2.1675
-
2.1685
-
2.1695
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2.1705
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2.G.2
Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
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2.1715
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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 shape.
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2.1725
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2.1735
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2.1745
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2.1755
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2.1765
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2.G.1
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Operations and Algebraic Thinking
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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.
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2.120
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2.220
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2.315
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2.45
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2.510
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2.65
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2.720
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2.810
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2.920
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2.1010
-
2.1120
-
2.125
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2.1310
-
2.1415
-
2.1515
-
2.1610
-
2.1710
-
2.1810
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2.1920
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2.2020
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2.2120
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2.2220
-
2.2320
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2.2415
-
2.2515
-
2.2620
-
2.2710
-
2.2820
-
2.2910
-
2.3010
-
2.3120
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2.3310
-
2.345
-
2.355
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2.3610
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2.375
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2.385
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2.395
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2.4010
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2.OA.2
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
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2.1010
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2.125
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2.1310
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2.1810
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2.2820
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2.2910
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2.3120
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2.4110
-
2.4215
-
2.435
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2.4420
-
2.4515
-
2.4615
-
2.4710
-
2.4850
-
2.4910
-
2.5015
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2.5120
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2.5215
-
2.535
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2.5420
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2.5510
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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.
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2.5610
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2.5710
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2.5810
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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.
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2.595
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2.OA.1
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Number and Operations in Base Ten
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2.NBT.1a
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, 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."
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2.NBT.1b
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases: 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).
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2.6120
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2.6215
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2.6315
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2.6410
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2.6620
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2.6720
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2.NBT.2
Count within 1000; skip-count by 5s, 10s, and 100s.
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2.NBT.3
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
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2.7115
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2.7215
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2.7320
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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.
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2.7420
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2.7515
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2.7620
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2.7720
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2.7820
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2.120
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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.
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2.7915
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2.8015
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2.8120
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2.8215
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2.8320
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2.8410
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2.8515
-
2.8620
-
2.8715
-
2.8820
-
2.8910
-
2.9020
-
2.9120
-
2.1810
-
2.2020
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2.2120
-
2.2515
-
2.2620
-
2.2910
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2.3120
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2.4420
-
2.4515
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2.5120
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2.5420
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2.NBT.6
Add up to four two-digit numbers using strategies based on place value and properties of operations.
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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, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
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2.6315
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2.6410
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2.9315
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2.9420
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2.9520
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2.9620
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2.9720
-
2.9820
-
2.9920
-
2.10020
-
2.10120
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2.10220
-
2.10320
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2.10420
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2.10520
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2.10620
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2.10720
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2.10810
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2.720
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2.5120
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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.
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2.10920
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2.11020
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2.11120
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2.11220
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2.11320
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2.11420
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2.NBT.9
Explain why addition and subtraction strategies work, using place value and the properties of operations.
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2.11520
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2.11620
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2.11715
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2.11815
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2.11910
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2.4110
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2.4910
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2.NBT.1a