The Common Core State Standards covered in Unit 2  are:

  • Add and subtract fractions with unlike denominators, including mixed numbers

  • Rewrite fractions with unlike denominators as equivalent fractions with a common denominater in order to find their sum or difference

  • Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem.

  • Mentally estimate the answers to word problems involving addition and subtraction of fractions with like and unlike denominators

  • Assess the reasonableness of answers to word problems involving addition or subtraction of fractions with like and unlike denominators

  • Solve word problems involving the division of whole numbers with fractions or mixed number quotients

  • Multiply a whole number by a fraction

  • Solve word problems involving multiplying a whole number by a fraction

Pearley's field hockey uniform shows a 2-digit number.

The number is prime.

If the digits are reversed, the number is still prime.

The ones digit is 4 less than the tens digit.

What number in on Pearley's uniform?

Mr. Green, Mr. Black and Mr. Brown wear green, black and brown winter

"It's funny," says Mr. Green, "that none of our coats matches our names."

"Big deal," says the man in the black coat.

Who is wearing which coat? 

How many minutes are represented by each fraction of an hour?

You can find answers by shading a clockface.

3/4 of an hour

2/3 of an hour

1/12 of an hour

1/5 of an hour

5/6 of an hour


At the Valley View Picnic, 3/4 of the guests entered the boat race and

1/2 of the guests entered the sack race.

There were 24 people at the picnic.

How many people entered both races? 


Cordelia played her guitar for 1/3 of an hour in the morning and 1/2 an hour in the afternoon.

Altogether, what part of an hour did she play the guitar?

Grant went outside for an hour.

He walked for 2/6 of an hour, ran for 2/8 of an hour and sat for the rest of the hour.

What part of the hour did he sit?

For each set of fractions, identify the pair
which satisfies the given conditions.

3/4, 3/8, 1/2, 2/3, 4/16 
The sum is 3/4
1/2, 2/5, 4/8, 1/10, 3/10
The sum is 1/2
7/8, 1/2, 3/8, 3/4, 1/16
The sum is 7/8
1/7, 9/14, 3/7, 1/2, 2/7
The sum is 1 1/7
1/5, 3/10, 4/15, 3/5, 4/5
The sum is 13/15


Adding Fractions

How to Add Fractions-Khan Academy VIDEO
Add Three or More Fractions
Adding Fractions Using Models
Adding Fractions-Online Practice
Practice Adding Fractions Online
Adding Fractions with Unlike Denominators
Animation of How to Add/Subtract Fractions
Add Three or More Fractions-Word Problems
Practice Adding Fractions with Unlike Denominators-Khan Acadmy

Subtracting Fractions

Subtracting Fractions Online
Subtract Fractions Using Models
Practice Subtracting Fractions Online
Subtracting Fractions-Khan Academy-VIDEO
Subtracting Fractions-Explanation and Practice
Subtracting Fractions with Unlike Denominators
How to Subtract Fractions-Use your specific problems
Subtracting Fractions Online-check your work immediately for points

Adding and Subtracting Fractions

Compare Addition and Subtraction of Unit Fractions
Practice Adding and Subtracting Fraction online
Fractions Timed Tests-How Many Can You Get Right?
Add and Subtract Fractions Word Problems Online Practice
How to Add and Subtract Fractions - Explanation and Practice
Practice Adding and Subtracting Fractions Online-Multiple Choice Answers
Adding Fractions-Math Worlds-choose numbers, then fractions and select what you'd like to practice
Fraction Four-choose the operation you want including adding and subtracting fractions

Adding and Subtracting Mixed Numbers

Rounding mixed numbers
Estimate Sums and Differences with Mixed Numbers

Adding Mixed Numbers-Video
Add Mixed Numbers in Online Practice
Practice Online Adding of Mixed Numbers
Add Mixed Numbers with Unlike Denominators

Subtracting Mixed Numbers-Video
Subtract Mixed Numbers in Online Practice
Practice Online Subtracting of Mixed Numbers
Subtract Mixed Numbers with Unlike Denominators

Add and Subtract Mixed Numbers in Word Problems
Add and Subtract Mixed Numbers-Step by Step and a Quiz to Practice
Adding and Subtracting  Mixed Fractions-Explanation and Practice Problems-Interactive

Adding and Subtracting Fractions Games

MathMan-Eat Answers!
Math Football-Adding Fractions
Speedway Fractions-add and subtract fractions
Adding and Subtracting Fractions Jeopardy
Mixed Numbers and Fraction Jeopardy Game
Hoop Shoot-Add Fractions and Shoot Hoops
Hoop Shoot-Subtract Fractions and Shoot Hoops
Fruit Shoot Splat Fraction Subtraction-lots of types of problems to practice

Multiplying Fractions

Multiply fractions and whole numbers I
Multiply fractions and whole numbers II
Multiply whole numbers and fractions-word problems
Multiply a mixed number by a fraction-online practice

Ratio Tables

Introduction to ratio tables-VIDEO
Ratio tables, a bit more challenging-VIDEO

Practice Ratio Tables
Ratio Tables from Khan Academy
Practice ratio tables-IXL Math
Complete the ratio table-online practice
Using ratio tables to find equivalent ratios
Ratio tables and equivalent fractions game

Fractions with clocks and money

Fractions and money-VIDEO
Interactive clock fractions
How to use the clock model-VIDEO

Equivalent and Simplified Fractions

Equivalent fractions-instruction and practice
Equivalent fraction PacMan
Equivalent fractions fishing game
Equivalent fractions-fill the coffee pot game
Shoot the equivalent fractions game
Simplify fractions-instruction and practice
Simplified fractions PacMan
Shoot the simplified fractions
Compare fractions-instruction and practice

Greatest Common Factor
Least Common Multiple

Greatest Common Factor
Greatest common factor-instruction and practice
Greatest common factor instruction from Khan Academy
Practice greatest common factor online-IXL math
Practice greatest common factor online-aaamath
Greatest common factor online quiz
Greatest commmon factore game-help Sketch
Shoot the greatest common factor

Least Common Multiple
Least common multiple explanation-Video from Khan Acadmy
Practice least common multiple from Khan Academy
Least common multiple instruction and practice
Practice least common multiples-aaamath
Find the least common multiple-IXL Math
Least common multiple online quiz
Shoot the pirates's ship-least common multiple-game
Throw snowballs at the least common multiple-game
Shoot the least common multiple-game

Time to Exercise the Brain

Daily Sudoku for Kids Brain Benders Colorsok-Move theTiles
Prime Factorization Online Game
Uncross the Lines
Online Mankala
Who Wants to Win $1,000,000.00? 5th Grade Gifted and Talented Math
Family Math Challenges
 What's the Best Way to get Paid?  Mystery Math Coin Flipping

   Links to the math sites that we love!


Great Help for Most Place Value Need help? Ask Dr. Math
Practice rounding with online flashcards Math Dictionary for Kids
Online Flashcards-all operations Tons of chances for practice-worksheets
Challenging Math Problems
A+ Math Games
Math Mania Challenges
Tower of Hanoi
Mystery Math-How do they do that? Order of Operations
Cool Math-Interactive Activities
Math Baseball
Multiplication tips and tricks
Tesselations-Math is Fun!
The Fruit Game Math Playground