Free online sources that offer practice multiple choice fourth grade math problems include StudyZone.org and AnalyzeMath.com. Both sites feature interactive math activities designed to hold the attention of children while they learn.
Studyzone.org features simple interactive questions for elementary test prep in the areas of language arts, math and social studies. The math section ranges from preschool to fourth grade. A combination multiple choice section for third and fourth grade covers problem solving, connections/representation, number sense and operations/algebra, measurement, and statistics and probability. Each problem includes a function to check the answer, which shows a more detailed explanation of the solution.
AnalyzeMath.com is an extensive site that covers mathematical areas from basics to calculus, as well as SAT and ACT practice. The fourth grade math section covers word problems, geometry, place value, basic operations, decimals, patterns, logic and conversion problems. Many of these questions are multiple choice, and each section has a list of answers at the bottom. A few sections have detailed solution and explanation links. The site also features links to online calculators to check your work.
Be aware that math curriculum may change over time and can vary widely across states and school districts. StudyZone.org was developed by teaching professionals from the Oswego City school district in New York State and was last updated in 2011. The primary math page at AnalzyeMath.com was last updated in 2010.