In first grade, she should have learned the basic addition and subtraction facts accurately up to 10. If she is in second grade, she will be reviewing these facts during the first part of the year. Then, she will learn to handle the facts up to 20 and be introduced to multiplication and division. By the time children reach third grade, they are expected to have mastered all their basic addition and subtraction facts and will continue working on the multiplication facts and corresponding division facts.
It's time to talk to your daughter's teacher. You need to determine whether your child's problems with math tests are due to test anxiety or poor recall of the basic math facts. If her problem is test anxiety, a few more minutes on timed tests might resolve the problem.
You can help your daughter prepare for tests by giving her practice tests in exactly the same format as her teacher uses. At first, let her take as much time as she needs, then gradually shorten the test time to what she'll experience at school.
Basic math facts need to be learned so that students can recall them instantly. Make a set of flash cards with your child. When she doesn't know a fact such as 3+4, have her lay out counters so she can see the problem and then write down the problem and answer. It's also helpful to learn strategies for solving the problems. For example, she can think of 3+4 as 3+3+1.
Besides using flash cards for drill, let your daughter practice her math skills through games. For board games, use a pair of dice instead of cards or a spinner.