Hi, what do you want to do?
Illustrative Mathematics
Illustrative Mathematics: 4.oa Comparing Growth, Variation 1
The purpose of this task is to foster a classroom discussion that will highlight the difference between multiplicative and additive reasoning. Aligns with CCSS.Math.Content.4.OA.A.1 Interpret a multiplication equation as a comparison
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Missing Number
[Free Registration/Login may be required to access all resource tools.] The resource is a video showing students how to find a missing number in a multi-step addition and subtraction problem using inverse operations. Adaptive practice...