Open Middle®
Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to make a product that’s as close to 50 as possible.
Hint
How can thinking about the two numbers being multiplied together help you figure out the product?
What two numbers have a product that is very close to 50?
How can you make those two numbers?
What two numbers have a product that is very close to 50?
How can you make those two numbers?
Answer
The closest product is:
7 x (8 – 1) = 49
7 x (8 – 1) = 49
Source: Owen Kaplinsky
In your answer it looks like you repeat 9 in the second solution. And it looks like you are asking us to get as close to 50 as possible but that was not in instructions. There are MANY different solutions with the way the instructions are written.
Thank you for this comment!! It was exactly what I was thinking. I will reword the instructions so that it makes sense for my students.
Seems to be an error here. The problem is a repeat of Multiplying Differences 1, but the answer is to a different problem.
Yeah, you are all right. Not sure how we didn’t notice this earlier. It’s updated to show that we wanted it to be closest to 50.
I am having trouble printing these tasks. It says “site cannot be reached”…
Thank you
7 (9 -1) = 56