P1 Math Semestral Assessment 1 is a revision paper with questions that focuses on the topics of Numbers to 20, Addition and Subtraction within 20 and Length which are covered by most schools in Semester 1 of Primary 1 (Grade 1). These topics are usually tested in the Math Semestral 1 Examination. The paper focuses on application of concepts learnt. A detailed answer key is also provided with a detailed marking scheme worked out by an experienced Math teacher.