Monday, July 25, 2011

Floor Multiplication of Big Numbers

Black Yarn
7 pieces cut 12-inches long 
Number digit cards 0-9
(you will need several cards of each number)
Operation symbol cards
for addition and multiplication
(+ and x)

What We Did
First, the girls laid out the yarn as in the picture, so that there were 5 vertical lines and two horizontal. The vertical lines created columns to keep the numbers lined up. Then they laid out the number and multiplication symbol cards above the top horizontal line to create the multiplication problem. Then, as they solved it, they would place the other cards, including the addition symbol card, in the correct spots below the top horizontal line, showing the the steps to finding the product.

No comments:

Post a Comment