Curated OER
Greatest Common Factor
Given 10 number pairs, learners find the greatest common factor for each. For several, one of the numbers is the greatest common factor, and for others mathematicians will need to think a little harder. There space for learners to show...
Curated OER
Sum Boxes
In this number pairs activity, 2nd graders look over 6 cubes of numbers and circle all the number pairs in each one that equals the sum above each cube.