This study investigates the factors that contribute to the low numeracy level in mathematical fundamental operations, such as addition, subtraction, multiplication, and division, among Grade 7 students. The research used a descriptive research design to assess the identified factors in terms of student-related factors, environmental factors, and home and family-related factors and their impact on students' numeracy skills and teachers-related factors in terms of teaching methods, teacher competency, and instructional materials. A total of 225 Grade 7 students were selected from Can-avid National High School as respondents. Data were gathered through the use of a structured survey questionnaire and analyzed using descriptive statistics, such as frequency counts, means, and percentages. Results indicated that most of the respondents showed below-average performance with regard to fundamental mathematical operations. Lack of motivation and prior knowledge, among other student-related factors, coupled with poor attendance, were the major causes of low numeracy levels. Environmental factors, such as the home environment, socio-economic status, and lack of access to learning resources, added to the students' plight. The teacher-related factors included the use of traditional teaching methods and inadequate instructional materials, which negatively affected the performance of the students.