Prior to this lesson you maybe wish to introduce students to other relevant topics, for example: Mental and written addition and subtraction. Representing problems using bar modelling.

In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers.

Twenty-four first-grade children were asked to write number sentences and select appropriate alternative number sentences for addition and subtraction word problems. Responses were qualitatively ...