This math game has three groups of 15 tasks about adding tens. Students have to find a sum or a missing addend. There is also a hidden picture behind the questions. Only correct answers reveal it.

The beaver will help the learner gradually build their mental addition skills because it hides behind the questions. To see what a beaver looks like, students need to write the sums correctly.

This interactive worksheet will help children build their knowledge of numbers up to 100. In the first set of tasks, children have to match the answer and the question. In the second set, they write the answer. At the end of each task, there is a jigsaw puzzle as a reward.

The ducklings want to find a way to their mother. Students can help them by writing the correct answers to the questions. It's very easy for teachers to see how well all students are doing on the tasks.

Do you want the dog to fetch the stick? It's simple. You only need to write the correct answer. If the answer is wrong, the dog does not move. In the end, you can see how many minutes it took you to complete the task.

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Difficulties with adding 1-digit and 2-digit numbers can be easily overcome if students practice the concept in a fun and engaging way. This mental math game can be used in a classroom or at home.

Each of these interactive worksheets about mental addition to 100 has a gaming element.

In most of the math games, there is a hidden picture,which students can uncover by writing the correct answers. After each solved task, students receive a solving puzzle prize.

If the answer is not correct, pupils get immediate feedback.