4=10 - Do not be afraid of puzzles directly related to mathematics, because they mostly contain only basic expressions and easy-to-understand tasks! In this game you will have to deal with those numbers, when performing an expression, which result should be equal to 10. 500 levels of varying difficulty, but one goal and actions. Experiment on the use of different orders of operations and train not only the observation, the quick selection of the necessary numbers to solve the problem, but also calculations in your mind.