This lesson helps students develop an ability to compare and contrast as they explore two strategies to solve three-digit addition problems. This EL Math lesson can be used alone or alongside Three-Digit Addition Strategies Review.

Teach your students to add and subtract time using number lines. Your class will be gladly moving backwards and forward to the minute solving for related word problems.

Use this lesson to review three-digit addition strategies including base-ten drawings, number lines, and the standard algorithm.

Use this lesson to introduce composing and decomposing as part of your students’ addition and subtraction toolkits.