Open Middle®
Directions: Using the digits 1 to 4 at most one time each, fill in the boxes to make the largest possible product.
Hint
Where do you want to put your biggest number? Where do you want to put your smallest number? What would this look like as an array?
Answer
32 x 4 = 128 is the biggest product
Source: Robert Kaplinsky
Love the format of the boxes above but do not see them on the worksheet.
Is it possible to have those boxes added to the worksheet?
Many thanks for your great website
sincerely
Robin Schwartz
Hi Robin. The Open Middle Worksheet is not problem specific. So, for every problem students will need to add the boxes to their worksheet. Sorry!
32 x 4
42 X 3 =126
32 x 4 = 128
32×4=128
32 x 4 = 128
20 x 3=60
Zero was not a choice of digits.
32 x 4 128
32×4=128
43 x 2 = 86