Number & Operations in Base Ten

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the equation true. Source: Brian Errey

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the difference equal to 39. Source: Chris Ignaciuk

Directions: Using the digits 1 to 7, at most one time each, place a digit in each box to create a true statement. Source: Eric Appleton

Directions: Using the digits 1 to 6, at most one time each, place a digit in each box to create two 3-digit numbers. Make the sum as close to 1000 as possible. Source: Ian Kerr

Directions: Using the digits 1 to 9, exactly one time each, place a digit in each box to make the sum as close to 1000 as possible. Source: John Ulbright and Robert Kaplinsky

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create the closest possible sum to 100. Source: Graham Fletcher

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box so that you would not need to regroup when you subtract. Make sure your number is less than 63. Extension: Explain why you do NOT need to regroup using your number. Source: Chase Orton

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

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

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the equation true. Source: Robert Kaplinsky