Calculate drill

Thank you for playing. 1,000 downloaded!!

One character of a formula becomes a blank.

The position of a blank is never the same.

Mode

1. 1 digit and 1 digit calculate. Selection from among the four.

2. 1 digit and 1 digit calculate. Direct input.

3. 2 digit and 2 digit calculate. Selection from among the four.

4. 2 digit and 2 digit calculate. Direct input.

2 digit calculate is difficult. Do you answer correctly?