## Common Core State Standards (CCSS) Correlations ## Mathematics

### Domain - Operations and Algebraic Thinking, Grade 2

Represent and solve problems involving addition and subtraction.

Math.2.OA.A.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.

Activity Page
Adding Doubles - Practice 2 14
Tens and Ones - Practice 2 16
Addition Word Problems - Practice 1 48
Addition Word Problems - Practice 2 49
Subtraction Word Problems - Practice 1 60
Subtraction Word Problems - Practice 2 61
Multiplication Word Problems - Practice 1 82
Multiplication Word Problems - Practice 2 83
Measurement-Pounds - Practice 1 109
Measurement-Pounds - Practice 2 110
Measurement Word Problems - Practice 1 111
Measurement Word Problems - Practice 2 112
A Calendar Month - Practice 1 114

Math.2.OA.B.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.

Activity Page
Adding Doubles - Practice 1 13
Adding Doubles - Practice 2 14
Tens and Ones - Practice 1 15
Tens and Ones - Practice 2 16
Subtracting 2-Digit Numbers - Practice 1 50
Subtracting 2-Digit Numbers - Practice 2 51

Work with equal groups of objects to gain foundations for multiplication.

Math.2.OA.C.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.

Activity Page
Number Words 1 – 50 - Practice 2 32
Multiply 3s - Practice 2 70
Repeat Addition-10s - Practice 1 77
Repeat Addition-10s - Practice 2 78
Multiply 10s - Practice 1 79
Multiplication Word Problems - Practice 1 82
Multiplication Word Problems - Practice 2 83

Work with equal groups of objects to gain foundations for multiplication.

Math.2.OA.C.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.

Activity Page
Repeat Addition-2s - Practice 1 62
Repeat Addition-2s - Practice 2 63
Multiply-2s - Practice 1 64
Multiply-2s - Practice 2 65
Multiply-2s - Practice 3 66

### Domain - Number and Operations in Base Ten, Grade 2

Understand place value.

Math.2.NBT.A.2: Count within 1000; skip-count by 5s, 10s, and 100s.

Activity Page
Tens and Ones - Practice 1 15
Tens and Ones - Practice 4 18
Multiply-2s - Practice 2 65
Multiply-2s - Practice 3 66
Repeat Addition-3s - Practice 1 67
Repeat Addition-3s - Practice 2 68
Multiply 3s - Practice 1 69
Multiply 3s - Practice 2 70
Multiply-3s - Practice 3 71
Repeat Addition-5s - Practice 1 72
Repeat Addition-5s - Practice 2 73
Multiply-5s - Practice 1 74
Multiply-5s - Practice 2 75
Repeat Addition-10s - Practice 1 77
Repeat Addition-10s - Practice 2 78
Multiply 10s - Practice 1 79
Multiplication Word Problems - Practice 1 82
Multiplication Word Problems - Practice 2 83
Measurement-Pounds - Practice 1 109

Understand place value.

Math.2.NBT.A.3: Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

Activity Page
Tens and Ones - Practice 2 16
Tens and Ones - Practice 3 17
Tens and Ones - Practice 4 18
Hundreds - Practice 1 19
Hundreds - Practice 2 20
Hundreds - Practice 4 22
Number Words 1 – 50 - Practice 1 31
Number Words 1 – 50 - Practice 2 32
Number Words 1 – 100 - Practice 1 33
Number Words 1 – 100 - Practice 2 34
Number Words 1 – 1000 - Practice 1 35
Number Words 1 – 1000 - Practice 2 36

Understand place value.

Math.2.NBT.A.1: 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:

Activity Page
Hundreds - Practice 1 19
Hundreds - Practice 2 20
Hundreds - Practice 3 21
Hundreds - Practice 4 22
Least to Greatest - Practice 1 23
Least to Greatest - Practice 2 24
Least to Greatest - Practice 3 25
Greater Than, Less Than - Practice 1 26
Greater Than, Less Than - Practice 2 27
Greater, Less, Equal - Practice 1 30
Number Words 1 – 100 - Practice 1 33
Number Words 1 – 100 - Practice 2 34
Number Words 1 – 1000 - Practice 1 35
Number Words 1 – 1000 - Practice 2 36

Understand place value.

Math.2.NBT.A.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.

Activity Page
Hundreds - Practice 3 21
Least to Greatest - Practice 1 23
Least to Greatest - Practice 2 24
Least to Greatest - Practice 3 25
Greater Than, Less Than - Practice 1 26
Greater Than, Less Than - Practice 2 27
Greater Than, Less Than - Practice 3 28
Greater, Less, Equal - Practice 1 29
Greater, Less, Equal - Practice 1 30
Number Words 1 – 50 - Practice 2 32

Use place value understanding and properties of operations to add and subtract.

Math.2.NBT.B.9: Explain why addition and subtraction strategies work, using place value and the properties of operations.

Activity Page
Adding 2-Digit Numbers - Practice 1 37
Adding 2-Digit Numbers - Practice 2 38
Adding 2-Digit Numbers - Practice 3 39
Regroup and Add - Practice 1 40
Regroup and Add - Practice 2 41
Regroup and Add - Practice 3 42
Regroup and Add - Practice 4 43
Addition Word Problems - Practice 1 48
Addition Word Problems - Practice 2 49
Subtracting 2-Digit Numbers - Practice 1 50
Subtracting 2-Digit Numbers - Practice 2 51
Subtract 2-Digit Numbers - Practice 3 52
Subtract 2-Digit Numbers - Practice 4 53
Subtract 2-Digit Numbers - Practice 5 54
Subtract 3-Digit Numbers - Practice 1 55
Subtract 3-Digit Numbers - Practice 2 56
Subtraction Word Problems - Practice 1 60
Subtraction Word Problems - Practice 2 61

Use place value understanding and properties of operations to add and subtract.

Math.2.NBT.B.5: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Activity Page
Adding 2-Digit Numbers - Practice 1 37
Adding 2-Digit Numbers - Practice 2 38
Adding 2-Digit Numbers - Practice 3 39
Regroup and Add - Practice 1 40
Regroup and Add - Practice 2 41
Regroup and Add - Practice 3 42
Regroup and Add - Practice 4 43
Addition Word Problems - Practice 1 48
Addition Word Problems - Practice 2 49
Subtracting 2-Digit Numbers - Practice 1 50
Subtracting 2-Digit Numbers - Practice 2 51
Subtract 2-Digit Numbers - Practice 3 52
Subtract 2-Digit Numbers - Practice 4 53
Subtract 2-Digit Numbers - Practice 5 54
Subtraction Word Problems - Practice 1 60
Subtraction Word Problems - Practice 2 61

Use place value understanding and properties of operations to add and subtract.

Math.2.NBT.B.6: Add up to four two-digit numbers using strategies based on place value and properties of operations.

Activity Page
Adding 2-Digit Numbers - Practice 2 38
Adding 2-Digit Numbers - Practice 3 39
Regroup and Add - Practice 1 40
Regroup and Add - Practice 2 41
Regroup and Add - Practice 3 42
Regroup and Add - Practice 4 43
Add Three Numbers - Practice 1 44
Add Three Numbers - Practice 2 45
Regroup and Add 3-Digit Numbers - Practice 1 46
Regroup and Add 3-Digit Numbers - Practice 2 47

Use place value understanding and properties of operations to add and subtract.

Math.2.NBT.B.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.

Activity Page
Regroup and Add 3-Digit Numbers - Practice 1 46
Regroup and Add 3-Digit Numbers - Practice 2 47
Subtract 3-Digit Numbers - Practice 1 55
Subtract 3-Digit Numbers - Practice 2 56
Regroup and Subtract 3-Digit Numbers - Practice 1 57
Regroup and Subtract 3-Digit Numbers - Practice 2 58
Regroup and Subtract 3-Digit Numbers - Practice 3 59
Subtraction Word Problems - Practice 1 60
Subtraction Word Problems - Practice 2 61

Use place value understanding and properties of operations to add and subtract.

Math.2.NBT.B.8: Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Activity Page
Repeat Addition-10s - Practice 1 77
Repeat Addition-10s - Practice 2 78
Multiply 10s - Practice 1 79
Multiply 10s - Practice 2 80
Multiply-10s - Practice 3 81

### Domain - Measurement and Data, Grade 2

Measure and estimate lengths in standard units.

Math.2.MD.A.1: Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.

Activity Page
Measurement-Longest, Shortest, Equal 102
Measurement-Inches - Practice 1 104
Measurement-Inches - Practice 2 105
Measurement-Centimeters 106

Measure and estimate lengths in standard units.

Math.2.MD.A.4: Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.

Activity Page
Measurement-Longest, Shortest, Equal 102
Measurement-Feet - Practice 1 107

Measure and estimate lengths in standard units.

Math.2.MD.A.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.

Activity Page
Measurement-Longest, Shortest, Equal 102
Measurement-Inches - Practice 2 105
Measurement-Centimeters 106

Measure and estimate lengths in standard units.

Math.2.MD.A.3: Estimate lengths using units of inches, feet, centimeters, and meters.

Activity Page
Measurement-Inches - Practice 1 104

Relate addition and subtraction to length.

Math.2.MD.B.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 line diagram.

Activity Page
Multiply 10s - Practice 2 80
Measurement-Feet - Practice 1 107
Measurement-Feet - Practice 2 108

Relate addition and subtraction to length.

Math.2.MD.B.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.

Activity Page
Measurement-Inches - Practice 1 104
Measurement-Inches - Practice 2 105
Measurement-Centimeters 106
Measurement-Feet - Practice 1 107
Measurement-Feet - Practice 2 108
Geometry-Perimeters - Practice 1 129
Geometry-Perimeters - Practice 2 130
Perimeter Word Problems - Practice 1 131
Perimeter Word Problems - Practice 2 132

Work with time and money.

Math.2.MD.C.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?

Activity Page
Least to Greatest - Practice 1 23
Money-Coins - Practice 1 96
Money-Coins - Practice 2 97
Money-Dollars and Cents - Practice 1 98
Money-Dollars and Cents - Practice 2 99
Money Word Problems - Practice 1 100
Money Word Problems - Practice 2 101

Work with time and money.

Math.2.MD.C.7: Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.

Activity Page
Analog Clocks – 15 Minutes 115
Analog Clocks – 5 Minutes 116
Analog and Digital Clocks - Practice 1 117
Analog and Digital Clocks - Practice 2 118
Adding Time - Practice 1 119
Adding Time - Practice 2 120
Adding Time - Practice 3 121
Time Word Problems - Practice 1 122
Time Word Problems - Practice 2 123

Represent and interpret data.

Math.2.MD.D.10: Draw a picture graph 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 graph.

Activity Page
Charts and Graphs - Practice 1 7
Charts and Graphs - Practice 2 8
Charts and Graphs - Practice 3 9

### Domain - Geometry, Grade 2

Reason with shapes and their attributes.

Math.2.G.A.1: Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.(Sizes are compared directly or visually, not compared by measuring). Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.

Activity Page
Charts and Graphs - Practice 1 7
Adding 2-Digit Numbers - Practice 2 38
Regroup and Subtract 3-Digit Numbers - Practice 2 58
Multiply 3s - Practice 1 69
Fractions 1/2, 1/3, 1/4 85
Geometry – 2-D Shapes - Practice 1 124
Geometry – 2-D Shapes - Practice 2 125
Geometry – 3-D Shapes - Practice 1 126
Geometry – 3-D Shapes - Practice 2 127
Geometry – 3-D Shapes - Practice 3 128
Geometry-Perimeters - Practice 1 129
Geometry-Perimeters - Practice 2 130
Perimeter Word Problems - Practice 1 131
Perimeter Word Problems - Practice 2 132