3rd Grade STAAR Math FREE Sample Practice Questions Preparing your student for the 3rd Grade STAAR Math test? To succeed on the STAAR Math test, students need to practice as many real STAAR Math questions as possible. ... The arrow shows exactly the middle of two numbers 35 and 45, so the answer is 40. 9- 12 \(108 ÷ 9 = 12\) 10- C the model for the first fraction is divided into 8 equal parts ...