Put two groups of pictures together and count how many in all (sums to 5, then to 10).
What the worksheets look like
Easy
Start here: the simplest problems.
Medium
Bigger numbers and more steps.
Hard
The toughest problems and word problems.
Need a different kind of worksheet? Suggest one and we'll make it.
Practice this with a game
Same skill, more fun: earn stars and beat your best score.