Aliens Vs Math

You are now the savior of the earth! Aliens are invading our planet. Solving mathematical problems correctly can generate energy to attack him! You can choose to add, subtract, multiply and divide anyone to challenge. If you are good at it, you can also choose mixed questions to challenge. It is important to note that you need to respond quickly because there is a time limit. Also, you have three chances, come on, enjoy Aliens Vs Math and drive away aliens!