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Ten Frame Challenge

Directions: I have a horizontal ten-frame that has some counters on it. One row of the frame is full and one is not. What is the largest number I could make? What is the smallest number I could make?

Hint

Start by filling in one row of your ten frame with counters.
What does it mean to be the smallest number if one row of the ten frames is full and one is not?

Smallest number = 5
Largest number = 9

Source: Elizabeth Brandenburg

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Directions: Using the digits 1 to 9, at most one time each, fill in the …

1. Should the largest number be 9? One of the rows in the ten frame is not full, so that means you can’t have the full ten frame filled, correct?

• The way I see it is the smallest number would be 5 and the larges number would be 9. The problem does not specify that the second row of the ten frame must have any counters at all (representing 5), but does limit that row to not be full (representing at most 9).

• Douglas, that is exactly how I interpret the problem.

• I agree the smallest number is 5.

2. I agree that the answer should be between 5 and 9, so I’ve updated the answer.

• Even though it’s probably clear, I also added the word “horizontal” to make it clear how the ten frame is oriented.