This interactive worksheet has two sets of 20 questions. Kids have to match answers and questions in the first set. In the second set, they have to write the answer. A jigsaw puzzle is a little prize after each task.

(regrouping)

The dog wants to bring the stick to the man. If kids write the correct answer, the dog will move one step further. The wrong answer is deleted and students get the chance to write it again. The tasks in the interactive worksheet change each time you reopen it.

(no regrouping)

In this mental activity, kids add a one-digit and a two-digit number without regrouping. Feedback for correct and incorrect answers is immediate. Each correct answer reveals a piece of a hidden car which has a positive effect on motivation too.

The interactive worksheet includes three groups of 12 tasks. Kids have to find one of the missing addends. Each correct answer reveals a piece of hidden pictures of cute bees.

(no regrouping)

Young learners can help the lost ducklings find the mother duck by writing the correct answer. Any incorrect answer is automatically deleted and learners can try again. Teachers or parents can easily monitor progress on solving tasks.

(regrouping)

In this math game, students drag the correct answer to the question. Then a part of the turtle will be colored. Teachers can easily see how well and how quickly students solve problems.

The most valuable thing about these interactive learning games about addition to 20 is the immediate information about the answers.

If students write the wrong answer, they have the opportunity to correct it. Feedback is an essential part of effective learning.

Pupils can use mental math games in the classroom or at home.