Add and subtract fractions with friendly but unlike denominators (e.g., 2 and 10) using models and symbols
Building a Stage
Description Students will determine an unknown measure by using a tape measure as a number line. Within the context of building a stage using layers of different types of wood, students will find the sum of friendly but unlike denominators. This will help them to understand the need for common units (denominators) when adding fractions. 

Mathematics This is a real world task with connections to building and measuring with an Imperial tape measure, allowing students to add different types of fractions using a number line. Students work with friendly but unlike denominators in a more concrete way then just finding common denominators. They also engage in developing strategies for adding the fractions together by finding common units or by adding on using the tape measure (number line). 

Curriculum Connections Students will:


Instructional sequence


Highlights of student thinking Students may:

Key questions


Materials 