Basic Numerical Comprehension

Solve as many equations as you can in 5 minutes. Each equation has one or two gaps. Use the digits 1–9 (each digit can only be used once per equation) so the predefined result is correct.

1. 1. Click a number to select it.
2. 2. Click a gap to place it.
3. 3. Click a placed number again to remove it.
4. 4. When all gaps are filled, the next button appears.