Directions: Use the digits 1-9 each once to make a the largest possible sum. Source: Robert Kaplinsky and Ellen Metzger

Directions: Use the digits 1-9 each once to make a true statement. Source: Ellen Metzger

## Sum of Fractions Closest to 10

Directions: Using the digits 1 through 9, at most one each time, fill in the boxes to make the statement true. Source: Nanette Johnson, based on Giselle Garcia’s problem

Directions: Using the digits 1 through 9, at most one each time, fill in the boxes to make the statement true. Source: Giselle Garcia

## 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: …

Directions: Using the whole numbers 1 through 10, at most one time each, fill in the boxes so that the sum is equal to 1 whole. Source: Joshua Nelson

## 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

## Volume of Rectangular Prisms

Directions: Using the digits 1 through 9, each only once, fill in the boxes to create 2 rectangular prisms so the volume of one rectangle is double the volume of the other rectangle. Source: Joe Schwartz