Calculator 1. - Basic tasks

This Calculator volume introduces children to the world of numbers, the number circle 10. It organizes what you have learned about numbers and teaches correct numeracy with playful tasks, clarifying the concept of numbers. Children can learn about the relation between quantities, the two basic operations (addition and subtraction), the interchangeability of the members of the addition, the relationship between the two operations, and the number neighbors. This volume helps school-going and first-graders learn the basics. But it can also be rotated by students who have a harder time making friends with the mysteries of math.