Directions: Using the integers -9 to 9 at most one time each, fill in the boxes to make an equation where the product’s exponent has the greatest possible value. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes twice to make an equation. You may reuse all the digits for each equation. Source: Robert Kaplinsky

Directions: Using the integers -9 to 9 at most one time each, fill in the boxes to make a product that is as close to zero as possible without being exactly zero. Source: Robert Kaplinsky

Directions: Using the integers -9 to 9 at most one time each, fill in the boxes twice to make a positive product and a negative product. You may reuse all the integers each product. Source: Robert Kaplinsky

Directions: Using the integers -9 to 9 at most one time each, place an integer in each box to make a value that is as close to zero as possible without being exactly 0. Source: Robert Kaplinsky in Open Middle Math

Directions: Using the integers -9 to 9 at most one time each, place an integer in each box to make the least possible value. Source: Robert Kaplinsky in Open Middle Math

Directions: Using the integers -8 to 8 at most one time each, place an integer in each box to make the greatest possible value. Source: Robert Kaplinsky in Open Middle Math

Directions: Using the integers -9 to 9 at most one time each, place an integer in each box to make two values: one that is positive and one that is negative. You may reuse all the integers each time. Source: Robert Kaplinsky in Open Middle Math

Directions: Using the digits 0-9 only once each, create as many true equations as possible. Source: Annie DeAngelo and Maeve O’Connell

Directions: Using any number between 1 and 9, fill in the boxes to create a true statement. You may only use a number once. Source: Bryan Anderson