The 1st Grade Skills below are based on the Common Core Standards For Mathematics. You can find out more about the Common Core Standards here.

You will also find a listing of related math resources (worksheets, charts, etc) here.

**Note: Math standards and curricula can vary by location or school. Check with your child’s school to determine what 1st grade math skills are expected in your location.**

## Operations & Algebraic Thinking

## Solving word problems with adding and subtracting with numbers up to 20.

The listing of worksheets and other math resources below are related to the following standard extracted from the *Common Core Standards For Mathematics*:

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

### Example/Guidance

### Slightly Different

##### Word problems

- Adding To/ Taking From (5-pages with 30 questions)
- Joining/ Taking Apart & Comparing (8-pages with 48 questions)

## Solving word problems that require adding three numbers with a maximum total of 20.

The listing of worksheets and other math resources below are related to the following standard extracted from the *Common Core Standards For Mathematics*:

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

### Example/Guidance

### Game

### Build The Answer Games

- Adding 3 Numbers (to 10 and to 20)

## Understanding and applying the commutative (e.g. 7 + 4 = 11 then 4 + 7 = 11) and the associative (e.g. 3 + 5 + 4 = 12 then 8 + 4 = 12) properties when adding and subtracting.

The listing of worksheets and other math resources below are related to the following standard extracted from the *Common Core Standards For Mathematics*:

Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.).

**Worksheet**

### Fact Families

- Fact Families for 4 & for 5 e.g. 2 + 3 = 5, 3 + 2 = 5, 5 – 2 = 3, 5 – 3 = 2
- Fact Families for 6
- Fact Families for 7
- Fact Families for 8

##### Number bonds to 10

- Number Bonds (Numbers to 10) – 13 Pages

##### Slightly Different

- Breaking Numbers Apart (3-Page Addition and Subtraction Worksheet)

## Recognizing the relationship between addition and subtraction to help solve subtraction problems. e.g. To solve 10 – 3, find that number that when added to 3 gives 10.

*Common Core Standards For Mathematics*:

Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8. Add and subtract within 20.

**Game**

### Build The Answer Games

- Adding to Subtract (numbers to 5, to 10, and to 20)

## Identifying the relationship between skip counting and adding and subtracting.

*Common Core Standards For Mathematics*:

Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

### Example/Guidance

### Number line

- Vertical Line: 0 to 20 (1per-page and 4-per-page)
- Vertical Line: 0 to 50 (1per-page and 4-per-page)
- Lines from 0 to 10 & 0 to 20 (4-page document with “real”/ “open”)

## Adding and subtracting with numbers to 20 using strategies including making ten. (e.g. 9 + 6 = 9 + 1 + 5 = 15 and 15 – 7 = 15 – 5 – 2 = 10 – 2 = 8) and using fact families (e.g. 8 + 3 = 11 therefore 11 – 3 = 8).

*Common Core Standards For Mathematics*:

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

**Chart**

### Addition/ Subtraction Chart

- Customizable Addition Chart/ Square (lots of options)
- Addition Facts Chart e.g. Square to 20
- Addition Facts Chart e.g. to 20 (4 per page)

### Ten Frames

- Ten Frames (17-page document)

### Example/Guidance

- Adding & Subtracting Games
- Memorizing Addition & Subtraction Facts
- Making 10 – Examples & Worksheets

### Flashcard

- Addition – Sums to 9
- Subtraction – Numbers to 9
- Sums to 9 e.g. 6 + 3
- Numbers to 9 e.g. 6 – 3
- Taking away from 1 thru 5
- Taking away from 6 thru 7
- Taking away from 8 thru 9

### Methods to learn addition and subtraction

- Adding one ( + 1)
- Adding doubles e.g. 3 + 3
- Subtracting one ( – 1) e.g. 4 – 1
- Adding zero e.g. 6 + 0
- Subtracting doubles e.g. 10 – 5
- Subtracting to one e.g. 7 – 6
- Subtracting doubles e.g. 8 – 4
- Adding two ( + 2) e.g. 4 + 2

**Game**

### Build The Answer Games

- Fact Families to 20
- Number Bonds up to 10 e.g. 6 + ? = 8, 5 + ? = 8
- Magnets to Make 10 e.g. 4 + __ = 10
- Addition &/ or subtraction game (numbers to 9 and to 19)

### Matching Game

### Target Game

- Targeting What Makes 10 e.g. __ + 3 = 10
- Adding & Subtracting Within 5 (e.g. 2 + 3 =5, 4 – 1= 3)
- Adding & Subtracting Within 5 (e.g. 2 + 3 =5, 4 – 1= 3)
- Addition & Subtraction: To 9 and To 19 (timed or unlimited time)
- 1 or 2 more than (e.g. 1 more than 6)

### Quiz

- Addition with making 10 e.g. 7 + 6 =13

### Table

**Worksheet**

### Addition and Subtraction Facts

- Basic Addition Number +1
- Basic Facts: Adding Zero
- Basic Facts: Zeros & Doubles
- Basic Facts
- Adding Doubles
- Basic Facts: Review
- Doubles Subtraction
- Basic Facts: Addition & Subtraction
- Addition & Subtraction Facts
- Subtraction Facts: Right Next To Each Other
- Basic Facts: Subtraction
- Basic Facts: Number Plus One
- Addition & Subtraction Facts
- Doubles Subtraction
- Adding & Subtracting Facts
- Adding 2 Worksheet: 2 Ladder
- Basic Facts: 2 Ladder & Doubles
- Basic Facts: Practice All Tricks
- Basic Facts: Doubles & Number +1
- Basic Facts: Number +1 & Doubles
- Basic Addition & Subtraction: Backward 1
- Basic Facts: Addition & Subtraction
- Addition & Subtraction Facts
- Basic Facts: Number +1 , Doubles, & backwards 1
- Basic Facts: Number +1 , Doubles, & backwards 1

### Bridging

- Making (Bridging) 10 e.g. 7 + 4, 8 + 5

### Fact Families

### Number bonds to 10

- Number bonds to 10 e.g.3 + ___ = 10
- Addition within 10 (2-page worksheet with Cuisenaire Sandwiches)
- Addition & Subtraction within 10 (2-page worksheet with Cuisenaire Sandwiches)
- Number Bonds to 10 (worksheet/ activity)
- Number Bonds to 9 (worksheet/ activity)
- Number Bonds to 8 (worksheet/ activity)
- Number Bonds to 7 (worksheet/ activity)
- Number Bonds to 6 (worksheet/ activity)
- Number Bonds to 5 (worksheet/ activity)
- Number Bonds to 4 (worksheet/ activity)
- Complements to 10 Number Search Complements to 5, 6, 7, 8, 9, or 10

### Slightly Different

- Adding Three Numbers (within 20) e.g. 6 + 5 + 7
- Adding Three Numbers With Two Adding To 10 (within 20) e.g. 7 + 3 + 8
- Mappings to 10 # 1 e.g. add 2 to 4, 6, 7, & 8
- Mappings to 10 # 2
- Mappings to 20 # 1 e.g. add 6 to 7, 8, 9, & 11
- Mappings to 20 # 2

### Three or more

- Three 1-digit numbers (with two adding up to 10) e.g. 7 + 5 + 3

### To 10

- Numbers to 9 (3 of 3) e.g. 8 – 4

### Worksheet Generator

- Customizable Addition Worksheet Generator
- Addition & Subtraction Worksheets
- Addition/ Subtraction Worksheet Generator (adding and/or subtracting zeros, ones, and/or doubles)

## Recognizing the meaning of the equal sign and identifying its correct use. e.g. 5 = 2 + 3 is true but 3 + 2 = 4 + 3 is not.

*Common Core Standards For Mathematics*:

Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

#### Activity

##### Domino Cards

- Printable Domino Cards (28 dominoes on 2 pages)
- Blank Domino Cards : Make Your Own Dots! (by click or by hand)

#### Worksheet

### To 10

- 1-digit numbers e.g. 6 + 3, 9 – 4
- Numbers to 9 (1 of 3) e.g. 8 – 4 (both horizontal and vertical formats)
- Sums to 9 (1 of 3) e.g. 6 + 3 (both horizontal and vertical addition)
- Numbers to 9 (2 of 3) e.g. 8 – 4 (both horizontal and vertical formats)
- Sums to 9 (2 of 3) e.g. 6 + 3 (both horizontal and vertical addition)
- Sums to 9 (3 of 3) e.g. 6 + 3

### To 20

- Sums to 12 e.g. 8 + 4

*Finding unknowns in adding and subtracting equations.*

e.g. 5 + __ = 9 or 6 = __ – 4.

e.g. 5 + __ = 9 or 6 = __ – 4

*Common Core Standards For Mathematics*:

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _..

**Worksheet**

### To 10

- Missing Numbers With Adding & Subtracting to 10 #1 e.g. 6 – __ = 4, __ + 3 = 7
- Missing Numbers With Adding & Subtracting to 10 #2

### To 20

- Missing Numbers With Adding & Subtracting to 20 #1
- Missing Numbers With Adding & Subtracting to 20 #2 e.g. 12 – __ = 7, __ + 9 = 17

### Worksheet Generator

- Addition/ Subtraction Worksheet Generator (Cuisenaire Rod-like)
- Addition/ Subtraction Worksheet Generator

## Number & Operations in Base Ten

## Counting up to 120 from different starting points and reading and writing the numerals.

*Common Core Standards For Mathematics*:

Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

### Activity

### Chart

- Number in Words Chart – Enter values and display numbers in word form

### Number Grids

- Hundred Square (in color)
- Numbers Chart – From 10 to 999 Numbers : Adjustable Start Number, Interval, and Number of Rows
- Pocket-size Numbers Chart: 1 – 120 (4 per page)

### Flashcard

- Numbers from 21 to 40 (on five pages)
- Numbers from 41 to 60 (on five pages)
- Numbers from 61 to 80 (on five pages)
- Numbers from 81 to 100 (on five pages)

### Number line

- Large Scale Number Line: 0 to 100 (13 Pages)

### Worksheet

- Writing Numbers in Word Form (3-Page worksheet)

### Worksheet Generator

## Recognizing that, for 2-digit numbers, the digits represent the amount of ones and the amount of tens.

*Common Core Standards For Mathematics*:

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

1. 10 can be thought of as a bundle of ten ones – called a “ten.”

2. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.

3. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

**Chart**

### Place Value Charts

- Place Value Chart: Tens – with blocks for highlighting
- Place Value Chart: Tens

### Puzzle

- Number Grid Puzzle (with 10 Variations)

**Worksheet**

### Worksheet Generator

- Place Value Worksheet Generator (hundreds, tens, and ones)
- Preparing To Subtract – Regrouping Ten (e.g. 58 as 5 tens and 8 ones or 4 tens and 18 ones)
- Ones & Tens in a Number Frame

## Writing numbers up to 20.

*Common Core Standards For Mathematics*:

Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <..

#### Example/Guidance

## Understanding place value when adding or subtracting 2-digit and 1-digit numbers and when adding multiples of 10.

*Common Core Standards For Mathematics*:

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, 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 and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

### Puzzle

- Number Grid Puzzle (with 10 Variations)

### Worksheet

### Third/ Fourth Grade

- Addition & Subtraction (larger numbers) e.g. up to 999,999

## Finding 10 more or 10 less than any 2-digit number without writing or counting.

*Common Core Standards For Mathematics*:

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

#### Puzzle

- Number Grid Puzzle (with 10 Variations)

## Subtracting with multiples of ten (maximum 90). e.g. 80 – 50 = 20.

## Measurement & Data

## Comparing and ordering 3 objects by length.

## Measuring the length of an object using a shorter length as a unit of length. e.g. the pencil is 4 erasers long.

## Telling and writing time on the hour and on the half hour.

*Common Core Standards For Mathematics*:

Tell and write time in hours and half-hours using analog and digital clocks.

**Activity**

### Domino Cards

- Time Domino Cards #1 – to the hour and half-hour

### Example/Guidance

### Number line

**Worksheet**

### Blank Clocks

### Telling Time

- Time at the half hours
- Draw the hands on the clock : time to the nearest hour
- Draw the hands on the clock : time to the nearest hour
- Match the clock to the time : time to the nearest hour
- 12 Clock faces at each hour
- Telling Time – On the hour
- Telling Time – On the half-hour

### Worksheet Generator

## Categorize data into as many as three categories and make comparisons of that within these categories.

## Geometry

## Understanding the difference between what defines a shape and what doesn’t. e.g. a triangle having 3 sides is a defining attribute while the size or color is not a defining attribute.

## Creating composite shapes by combining a variety of different shapes together (both 2 and 3-dimensional).

## Dividing rectangles and circles into halves and quarters and using these terms to describe these equal shares.

*Common Core Standards For Mathematics*:

Partition circles and rectangles into two and four equal shares, describe the shares using the words *halves*, *fourths*, and *quarters*, and use the phrases *half of*, *fourth of*, and *quarter of*. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.

### Activity

Browse for skills and worksheets at other grade levels by clicking in the table below.