Here is the full list of all 26 Mighty Math achievements.
Score more than 4500 in a single run.
Score more than 3750 in a single run.
Score more than 4000 in a single run.
Score more than 4250 in a single run.
Score more than 3500 in a single run.
Survive Round 15.
Score more than 3000 in a single run.
Survive Round 12.
Survive Round 11.
Survive Round 10.
Collect either a positive or negative 8.
Collect every number in Round 1 and Round 2 in a single run.
Survive Round 9.
Survive Round 8.
Survive Round 7.
Survive Round 6.
Survive Round 5.
Collect either a positive or negative 6.
Collect either a positive or negative 4.
Collect either a positive or negative 9.
Collect either a positive or negative 7.
Collect either a positive or negative 5.
Collect either a positive or negative 2.
Survive Round 1!
Collect either a positive or negative 3.
Collect either a positive or negative 1.