ARM 10.54.4031. BENCHMARK FOR MATHEMATICS CONTENT STANDARD 3 FOR END OF GRADE 4

(1) The benchmark for mathematics content standard 3 for a student at the end of grade 4 is the ability to: (a) use symbols (e.g., boxes or letters) to represent numbers in simple situations; (b) explore the use of variables and open sentences to express relationships (e.g., missing addend) ; and (c) use inverse operations and other strategies to solve number sentences.