Number & Operations in Base Ten

Directions: Arrange the digits 1-6 into two 3-digit whole numbers. Make the sum as close to 1000 as possible. Source: Ian Kerr

Directions: Using the digits 1 to 9 at exactly one time each, fill in the boxes 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, fill in the boxes to create the closest possible sum to 100. Source: Graham Fletcher

Directions: Fill in the boxes 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, fill in the boxes to make the smallest (or largest) sum. Source: Robert Kaplinsky

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

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

Directions: Place any digit, 1 through 9, in the boxes below to create the smallest possible difference. Each digit can only be used once. Source: Graham Fletcher