Server Error

Server Not Reachable.

This may be due to your internet connection or the nubtrek server is offline.

Thought-Process to Discover Knowledge

Welcome to nubtrek.

Books and other education websites provide "matter-of-fact" knowledge. Instead, nubtrek provides a thought-process to discover knowledge.

In each of the topic, the outline of the thought-process, for that topic, is provided for learners and educators.

Read in the blogs more about the unique learning experience at nubtrek.
mathsWhole NumbersWhole numbers addition and subtraction

This page explains that combining two quantities and counting or measuring the combined quantity is addition in first principles. Addition is also explained using number-line.

click on the content to continue..

There are 3 red cars and 4 blue cars in the figure. These cars are combined together and the total number of cars are counted.

Considering the figure with 3 red cars and 4 blue cars. 3 and 4 are combined together and the counting is done from 1 to 7. The resulting count is 7.

A red pencil is 3 centimeters in length. A green pencil is 4 centimeters in length.

The two pencils are placed side-by-side. The length measurements is taken from
0 and the measure at the end is 7.

The count or measure of quantities can be combined or added.

The addition results in count or measure of the combined quantity.

Addition 3+4 is given in number-line. The count is started from 3. 4 jumps are made to land in 7. The result of the addition is 7.

The English word addition means: combining two quantities and measuring or counting the combined quantity

familiarize with the terminology

Addition - First Principles : Two numbers are considered, each of which represents a count or measurement. The quantities represented by the numbers are combined to form a result representing a combined count or measurement. The combined count or measurement is the result of addition.

eg: 20 and 13 are combined together 20+13 = 33.

20 is an addend

13 is also an addend

33 is the sum

familiarize with the terminology

sum is the result of the addition.

familiarize with the terminology
sum

Solved Exercise Problem:

What is the sum of 4 and 2?

• 7
• 6
• 6

The answer is '6'.

switch to interactive version