Objective:
To practice these math problems of 1NBTA1 worksheets, students are required to fill in the blanks by count backward from 20. Users can directly refer the answer key to verify the work with steps for the corresponding practice problems given in the 1.NBT.A.1 activities under the domain operations and algebraic thinking in common core state standards for 1st grade mathematics. The main objective of these 1.NBT.A.1 practice problems and answers is to make students to understand how to (1NBTA) Extend the counting sequence.
