DOK 3: Strategic Thinking | Open Middle®

Subtracting Fractions

January 31, 2014 17

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the smallest (or largest) difference. Source: Robert Kaplinsky

January 31, 2014 3

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the smallest (or largest) sum. Source: Robert Kaplinsky

January 31, 2014 10

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the largest sum. Source: Robert Kaplinsky

January 31, 2014 31

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to make the least possible difference. Source: Robert Kaplinsky

January 9, 2014 6

Source: Smarter Balance

January 9, 2014 9

Source: Smarter Balanced Practice Test

January 9, 2014 5

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to make the greatest (or least) product. Source: Bryan Meyer

January 8, 2014 6

Directions: Fill in the blanks with integers so that the quadratic expression is factorable. Source: Nanette Johnson