Topic 2: Adding & Subtracting Whole Numbers Using Mental Math to add/sub Estimating sums/diff of whole #s Missing or Extra info Adding whole #s Subtracting whole #s Subtracting across zeros Fun Math Resources!Check these out daily for updated content! Categories: Current Math Happenings, ParentBy Mrs. EberlySeptember 17, 2015Post navigationPreviousPrevious post:3rd grade Topic 2 – Middle of SeptemberNextNext post:5th grade Topic 2 – Middle of SeptemberRelated postsMultiply, multiply AND divide too!October 5, 2016Multiply, multiply, and multiply some more!October 5, 2016Subtraction, subtraction and more subtraction!October 5, 2016Get ready for a MATH-tastic SUMMER!May 2, 2016PercentsApril 6, 2016MeasurementApril 6, 2016