Title: Weakly Supervised Formula Learner for Solving Mathematical Problems. Abstract: Mathematical reasoning task is a subset of the natural language question answering task. Several approaches have been proposed in existing work to solve mathematical reasoning problems. Among them, the two-phase solution to first predict formulas from questions and then calculate answers from formulas has achieved desirable performance. However, this design results in the reliance on annotated formulas as the intermediate labels for training. In this work, we put forward a brand-new idea to enable the models to explore the formulas by themselves to eliminate the reliance on formula annotations. To realize this, we proposed Weakly Supervised Formula Leaner, a learning framework that can autonomously search for the optimal formulas through the training process and continuously update itself. Our experiment is conducted on a typical mathematical dataset MathQA. The result shows that our models learning with weak supervision outperform the baseline methods.