Thanks so much. My students are so much more successful now that I build on their knowledge, especially when that knowledge is faulty. I’m going to check out your math blog right away.

]]>I’m using a version of this method while I tutor my student on subtracting mixed numbers. When subtracting a mixed number with a larger fraction than the first, we have to borrow 1 whole from the whole number and add it to the fraction to make it bigger, then subtract.

Ex.

3 1/4 – 1 3/4 =

2 + 1 +1/4 – 1 3/4 =

2 + 4/4 +1/4 – 1 3/4 =

2 5/4 – 1 3/4 =

2-1 + 5/4 – 3/4 =

1 2/4 =

1 1/2

Great article!

]]>Thanks, Joanne. And you forced me to remember my password for my site. So, double thanks.

]]>It really is a good one. It has such a Calvin and Hobbes energy, and the potato is the perfect contrast to the little girl.

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