Use the hundreds chart, tens frames, tens sticks, skip counting, base ten, graphs, and more to practice adding and subtracting two- and three-digit numbers. Children will develop a deeper understanding of addition and subtraction, as well as the relations
This lesson provides students with practice as they find the missing parts of a whole and justify their reasoning. Use alongside the What's That Number lesson or alone as a support lesson for students.
In this lesson, students must become detectives to solve for the missing number in each subtraction problem. They will develop and use their powers of mathematical reasoning using number bonds to find differences.