Addition & subtraction strategies to solve two-digit equations using an open number line. In this lesson, students go over using different addition and subtraction strategies to solve two-digit ...

Want to help your first-grader master math? Here are some of the skills your child will be learning in the classroom. Understand place value in one- and two-digit numbers. Understand that in two-digit ...

Students go over using number lines to solve the four equations in a fact family. In this lesson, students go over using number lines to solve the four equations in a fact family. Julia uses charts, ...