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# Number & Operations in Base Ten

## Subtracting Decimals to Make Them As Close to One as Possible

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes to get the difference that is as close to 1 as possible. Source: Giselle Garcia

## Multiplication of large numbers

Directions: Use the digits 1 to 9, at most one time each, to create two numbers that have a product as close to 500,000 as possible. NOTE: You may use any length of factors as you would need. Ex 8 digit by 1 digit. 4 digit by 3 digit. Source: Miles Knight

## Evaluating a Decimal Expression

Directions: Using the whole numbers 0 through 9, no more than one time each, make the value of this expression is as large as possible. Challenge: Try to make this expression as close to 30 as possible (for an added challenge, try to make this expression as close to 30 as possible using just the digits 1 through 9). Source: …

## Rounding Decimals

Directions: Use the whole numbers 1 through 6, at most one time each, to fill in the boxes and make the largest (or smallest) number that rounds to 5 Source: Annie Forest

## Decimal Product Close To 50

Directions: Use the numbers 1 through 9 at most one time each so that the product is as close to 50 as possible. Source: Robert Kaplinsky

## Multiplying Decimals Given One

Directions: Use the numbers 1 through 9 at most one time each to make a true statement. Source: Robert Kaplinsky with help verifying the answer from Marcia and Rick Casterline

## Adding Decimals 2

Directions:  Make the largest (or smallest) sum by filling in the boxes using the whole numbers 1-9 no more than one time each. Source:  Daniel Luevanos

## Dividing Two-Digit Numbers (Elementary)

Directions:  Make the smallest (or largest) quotient by filling in the boxes using the whole numbers 1-9 no more than one time each Source:  Robert Kaplinsky