BBC

How to add and subtract decimals

Write the numbers in a vertical list, lining up the decimal points. If the numbers have a different amount of digits, there may be some gaps in the columns. Fill in any gaps with a zero so that each ...
GitHub

Calculator (jQuery, Node, and Express): Basic calculator that can handle addition, subtraction, division and Multiplication. Can use decimal and negative numbers and validates ...

The logic for the calculator needs to be housed on the Server, where the client side will take in the values (in 2 input text fields) and the type of mathematical operation (selected using a button on ...
archive

Basic Fundamentals of Math for Addition, Subtraction, Multiplication and Division using Whole Numbers, Decimals, Fractions and Percents

An illustration of a magnifying glass. An illustration of a magnifying glass.
GitHub

The Calculator can perform addition, subtraction, multiplication, and division. It can also handle parentheses and precedence. It can also handle negative and decimal numbers.

The arithmetic expression given by the user is passed to "Lexical Analyzer". Lexical Analyzer parses and validates the arithmetic expression and forms tokens of the expression. If the expression is ...
National Council of Teachers of Mathematics

Children's Conceptual Structures for Multidigit Numbers and Methods of Multidigit Addition and Subtraction

Karen C. Fuson, Diana Wearne, James C. Hiebert, Hanlie G. Murray, Pieter G. Human, Alwyn I. Olivier, Thomas P. Carpenter, Elizabeth Fennema Researchers from 4 projects with a problem-solving approach ...