This document provides a Definitive Budget of Work (DBOW) in Mathematics for grades 1 to 10 in the Philippines based on the Most Essential Learning Competencies (MELCs). The DBOW aims to guide teachers in teaching the essential topics to meet curriculum standards given limited school days during the pandemic. It includes the content and performance standards for each grade and quarter, lists the MELCs to be taught, assigns a number of days to each MELC, and provides remarks on prerequisite skills and teaching tips. The DBOW is intended to help teachers design lessons that fully cover the MELCs over the instructional period while allowing additional time for assessments, remediation and other activities.