Directions: Fill in the blanks with digits to make the answer closer to 200 than 300. Source: Marilyn Burns and Graham Fletcher

Read More »# Number & Operations in Base Ten

## Marble Madness 2

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make the following problem true. Jenny has ? ? ? marbles. Her brother has ? ? ? marbles. Together they have ? ? ? marbles. Source:Chase Orton

Read More »## Marble Madness 1

Directions: Using the digits 0 to 9 at most one time each, fill in the blanks to make the following problem true. Barbara has ___ ___ ___ marbles. She gives her sister ___ ___ ___ marbles. She now has ___ ___ ___ marbles left. Source: Chase Orton

Read More »## 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

Read More »## Multiplying a Two-Digit Number by a Single-Digit Number

Directions: Using the digits 1 to 4 at most one time each, fill in the boxes to make the largest possible product. Source: Robert Kaplinsky

Read More »## Greatest Difference of Two Rounded Numbers

Directions: Using the digits 0 through 9, find two numbers that round to 500, and have the greatest possible difference. Each digit can only be used once. Source: Michael Wiernicki, Graham Fletcher, and Rachel Nelli.

Read More »## Subtraction to Get the Smallest Difference

Directions: Using the digits 1 to 9, at most one time each, fill the boxes below to create the smallest possible difference. Source: Graham Fletcher

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