## Multiplying Two-Digit Numbers – Closest to 7,000

Directions: Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the product as close to 7,000 as possible Source: Paolo Tolomeo

## Time Twister

Directions: Using the digits 0 to 9, at most one time each, create three different times on the clocks where the span of the times are between 12 noon and 7 pm. How can you make the difference between the times the greatest? closest times together? Source: Jason Kornoely

## 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

Directions: Old Mother Hubbard is baking cookies so her cupboards won’t be bare anymore! She bakes 109 cookies in all. She bakes the cookies on 4 cookie sheets. Each cookie sheet is arranged into equal rows and columns, but not every cookie sheet has the same number of rows and columns. Using digits 0-9, at most once, how might the …

## Equations of Perpendicular Lines

Directions: Using the integers -9 to 9 (excluding 0) at most one time each, fill in the blanks to create two distinct perpendicular lines. Source: Louise Pepper with answers from the students of Kings College Alicante, Spain

## Multiplying Fractions 4

Directions: Using the digits 1 to 9 at most once each time, fill the boxes to make the greatest possible product. Source: Marc DeArmond

## Scientific Notation 2

Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to make a product that equals 800,000,000. Source: Robert Kaplinsky

## Prime Factorization 2

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make the greatest possible product. Source: Robert Kaplinsky