Math Topics
Dictionary
Addition 
An operation joining two or more sets where the result is the whole. When adding we use the plus sign '+'.
Commutative property 
The order in which two numbers are added does not affect the results. The commutative property does not apply to subtraction.
Number line 
A line that shows numbers ordered by magnitude from left to right or bottom to top; equal intervals are marked and labelled.
Schools
Free Trial
Addition Games & Exercises
Kindergarten Sample Exercises
Find one more than a number from 1 to 9
There's always at least one duck running late! Count the ducks into the double-decker bus and add one more.
Find a total by counting on...
Some mice are already in the hole. The brave ones are waiting to give the cat a run for his money. Count them all to chase them back in!
Grade 1 Sample Exercises
Understanding addition (counting all)
Give these wooden warriors their marching orders by correctly completing these addition questions!
Addition can be done in any order
It's that cat again. He's moved from mice to dice. Show him that addition can be done in any order by filling in the missing number, but watch out for those claws!
Grade 2 Sample Exercises
Adding three 1-digit numbers
Add the numbers on the cocoons to find the total and reveal the beautiful butterflies! Move them around to make counting easier.
Addition facts with totals up to 10
Be speedy with some musical math. Answer each question before the record runs out - you've only got a few seconds.
Grade 3 Sample Exercises
Rapid Recall
Help your friend get down the slide by filling in the missing number.
Knowing addition facts by heart
ARRRRGH! Find the pirate booty at the bottom of the sea by solving these addition problems.
More Addition Exercises
Grade 4 Sample Exercises
Adding 3 or 4 small numbers, finding pairs...
When adding lots of numbers, it often helps to pair them up. It's a moonlit night, so gather the fireflies to find the total.
Mental calculation strategies
Learn to add larger numbers with the help of a certain monkey.
Grade 5 Sample Exercises
Identify near doubles
This robot needs to be rewired! His hands and feet are all mixed up; use similar numbers to double in order to help sort him out.
Derive quickly two-digit pairs that total 100
Can you match the card pairs that equal 100? You've only got one minute - hurry, time is almost up!
Grade 6 Sample Exercises
Add near multiples
Who says snails are slow? Learn to add multiples of 10, 100, and 1,000
Grade 7 Sample Exercises
Rapid recall of integer and decimal complements
Playing darts is a great way to improve your addition skills. Take aim at the correct missing number with our Math-Whizz version.
Mental calculation strategies
Insert your quarters - it's time for a game of pinball. Can you correctly add up all the digits on the pinball's?
Grade 8 Sample Exercises
Use the laws of arithmetic
Commutativity, distributivity, and all that jazz. If the fish give the same answer, it's 'snap' from the alligator; if not, they get a lucky escape!
