Click on the fact button below. Hit the play button. Choose a number. Three problems appear. Drag yellow box answers to blue answer spaces under the problems. Hit the green bar or submit button to check answers. Hit the gray button on the pop-up to start the next set of problems. Keep playing until your score appears.
Drag the ones place answer from the green numbers to the ones answer space.
Drag the tens place answer from the blue numbers to the tens answer space.
If there is a red one it can be dragged to the hundreds answer space if the sum is 100 or more.
In the regrouping problems, the brown oval can be clicked to show a carried 1.
Hit the green bar or the submit button to check your answer.