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# Number & Operations in Base Ten

## Missing Digits

Directions: Fill in the blanks with digits to make the answer closer to 200 than 300. What is one solution? What other solutions can you find? How many possible solutions are there? How many possible solutions if you can’t use a digit more than once? Source: Marilyn Burns, Graham Fletcher

Directions: Use the numbers 0 – 9, no more than one time each, to make the following problem true. Jenny has ? ? ? marbles. Her brother has ? ? ? marbles. Together they have ? ? ? marbles. Source:Chase Orton

Directions: Use the numbers 0 – 9, no more than one time each, to make the following problem true. Barbara has ___ ___ ___ marbles. She gives her sister ___ ___ ___ marbles. She now has ___ ___ ___ marbles left. Source: Chase Orton

## Multiplying a Two-Digit Number by a Single-Digit Number

Directions: Using the numbers 1 – 4, no more than one time each, make the largest possible product. Source: Robert Kaplinsky