Sometimes 6 × 3 is thought of as “6 groups of 3.” However, consistency with the other arithmetic operations requires a second look. When adding 6 + 3, we start with 6 and transform it by adding 3. When subtracting 6 – 3, we start with 6 and transform … [Read more...] about Dr. Cotter on What 6 × 3 Means
multiplication
Dr. Cotter on Multivides
For a child with learning disabilities doing multivides, I suggest this shorter version: Start with any 4-digit number and multiply it by 4, then 5, and 6. Then divide the final product by 4, then 5, and 6. The final quotient must be the same as … [Read more...] about Dr. Cotter on Multivides
RS2 Level B, Multiplication as Arrays
Today we’re going to talk about why we teach multiplication to our younger children. Earlier this week I talked with Jenna from Portland. She was wondering why we’re teaching multiplication at this level. Very good question, Jenna! We introduce … [Read more...] about RS2 Level B, Multiplication as Arrays
