The purpose of this pilot study was to explore the impact of mathematics and reading learn- ing difficulties on the mathematics-vocabulary understanding of fifth-grade students. Students (n = 114) completed three measures: mathematics computation, general vocabulary, and mathematics vocabulary. Based on performance on the mathematics computation and gen- eral vocabulary measures, students were categorized with no learning difficulty (i.e., typical), mathematics difficulty without reading difficulty (MD-only), reading difficulty without math- ematics difficulty (RD-only), and combined mathematics and reading difficulties (MDRD). On the mathematics-vocabulary measure, students with MD-only or RD-only scored signifi- cantly lower than typical students, and students with MDRD demonstrated significantly lower performance than students with MD-only or RD-only.