Numbering fundamentals, basic operations and everyday measurement systems.
Articles in path
6
Slug
numeros-e-operacoes
Category
Numbers & Operations
Addition and subtraction are inverse operations that form the backbone of arithmetic. In this article we explore the concepts, the carrying and borrowing algorithm, and mental calculation strategies for greater speed.
The metre, kilogram and second are the base units of the International System. Learn the metric prefixes, convert between units of length, mass and time, and avoid the most common mistakes.
Multiplication is accelerated addition, and division is its inverse. In this article you will understand the properties of these operations, learn the algorithms step by step, and discover why division by zero does not exist.
Natural numbers form the foundation of all mathematics. Understand how they are organized, which are even and odd, prime and composite, and how to use divisibility rules in everyday life.
Ordinal numbers indicate position, not quantity. First, second, third — we use ordinals for floors, rankings, calendars, and much more. Learn how to write, abbreviate, and use them correctly in English.
Memorizing the times tables mechanically is less effective than understanding the patterns behind them. In this article we show the symmetry of the table, tricks for difficult facts, and how to use multiplication and division together.