Mr. Lake's Math Site
SAT Test Prep
The SAT has two different math sections. We will help you with Strategy and the Math.
One section does not allow a calculator. This section is where you would actually need one, but you are not allowed to. This means you must be able to do everything without one. You might want to refresh yourself with some of the Math Basics.
The other section does allow a calculator. This is a trick. The calculator is absolutely not going to help you in this section. If you find yourself using one, then it is probably the wrong approach to solving this problem.
TSI aka Accuplacer is also made by the same folks who make the SAT. The questions are similar. Here is their practice site with a practice app: