standard_description: Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.
problem_activity: Stage 2: Factors 1–5
Required Preparation
Materials to Gather
Colored pencils, crayons, or markers
Number cubes
Paper clips
Materials to Copy
Blackline Masters
Rectangle Rumble Stage 2 Grid
Rectangle Rumble Stage 2 Spinner

Narrative
Students generate factors with a number cube and a spinner with the numbers 1–5. Students use a
\(15 \times 15\)
grid.
Additional Information
Each group of students need a paper clip, a number cube, and two different color writing utensils.


aligns: no