If you were a minus sign, you would subtract one number from another. You could subtract food and balloons. In every problem, you would find the difference. What else could you do if you were a minus sign?
ISBN-13: 9781404847880
Availability: 
Temporarily out of stock
Published: January 2009
Reading Level: Upper Primary, Lower Secondary
Pages: 24
Format: Paperback
Publisher: Capstone Press
Product Category: Science / Science: Mathematics
