Abs tract. This study aimed to determine the performance of students with intellectual disabilities who are able to learn the first graders' skills in mathematics. The study population consists of all the intellectually disabled boys' and girls' students enrolled in primary, middle and secondary public schools in the governorate of Al -Res. The numbers of students were 44. The researchers used the descriptive approach in which they built a test to diagnose the mathematics skills of students with intellectual disabilities as the study tool.