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.

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

Practice finding unknown numbers in addition equations using fun and silly word problems.

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