 # Number & Operations in Base Ten

## Adding and Subtracting Two-Digit Whole Numbers

Directions: Directions: Use the digits 0 to 9, at most one time each, to make a true statement. Source: Brian Errey

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## Subtraction with Regrouping 2

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the difference equal to 39. Source: Chris Ignaciuk

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## Create an Equation

Directions: Use only the digits 1 to 7, at most one time each, fill in the boxes to create a true equation. Source: Eric Appleton

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## Sum to 1,000 – Two Addends

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

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## Close to 1000

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

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## Sums to 100

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

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## Subtraction without Regrouping

Directions: Using the digits 1 to 9, at most one time each, 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

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## Adding Two-Digit Numbers (Elementary)

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

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## Subtracting Two-Digit Numbers (Elementary)

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

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## Adding Two-Digit Numbers Given One

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

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