October 13, 2010, 7:42 pm

# More enVisionMATH: Adding "near doubles"

The last post about enVisionMATH and how I, as a math person and dad, go about trying to make sense of what my 6-year old brings home from first grade seems to have struck a chord among parents. The comments have been outstanding and there seems to be a real need for this kind of conversation. So I have a few more such posts coming up soon, starting with this one.

The 6-year old brought this home on Monday. Click to enlarge:

It’s about adding “near doubles”, like 3 + 4 or 2 + 3. In case you can’t read the top part or can’t enlarge the photo, here are the steps — yes, there are steps, and that’s kind of the point of this post — for adding near doubles:

1. “You can use a double to add a near double.” It gives: 4 + 5 and shows four blue balls and five green balls.
2. “First double the 4″. It shows 4 + 4 = 8, and the four blue balls, and four of the green balls with the extra green ball…
• The Chronicle of Higher Education
• 1255 Twenty-Third St., N.W.
• Washington, D.C. 20037