Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes so that the difference is as close to 50 as possible. NOTE: The digits used in the difference can be repeated. Source: Giselle Garica

Directions: Use the digits 0 to 9, at most one time each, to fill in the boxes so that the sum is as close to 10 as possible. Source: Giselle Garcia

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes to get the difference that is as close to 1 as possible. Source: Giselle Garcia

Directions: Use the digits, 0 through 9, without repeats, to complete the equation below: Source: Shaun Errichiello

Directions: Using the digits 0 through 9, at most one each time, create an an equivalent fraction and decimal number. Source: Giselle Garcia

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make the value of this expression is as large as possible. Challenge: Try to make this expression as close to 30 as possible (for an added challenge, try to make this expression as close to 30 as possible using just the digits 1 …

Directions: Using the digits 1 to 6 at most one time each, fill in the boxes to make the largest (or smallest) number that rounds to 5. Source: Annie Forest

Directions: Using the digits 0 to 9, at most one time each, fill in the boxes so that the fraction equals the repeating decimal. Source: Daniel Luevanos

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes so that the product is as close to 50 as possible. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make a true statement. Source: Robert Kaplinsky with help verifying the answer from Marcia and Rick Casterline