## NUMBERS AND OPERATIONS The addition is the mathematical composition operation that consists of combining, joining or adding two or more numbers to obtain a final or total quantity.

In the additive expression, four fundamental properties are always satisfied:

1) Commutative property:

A modification in the order of its elements (addends) will not modify the result; for example: 3 + 2 = 2 + 3

2) Associative property:

When three or more numbers are added, the order of the addends does not influence the result; for example: 4 + (2 + 1) = (4 + 2) + 1

3) Property of the neutral element (or identity element):

Any number added to the number zero (0) will result in the same number; for example: 5 + 0 = 5

4) Distributive property (combines multiplication and addition):

The result of the sum of two numbers (A and B) multiplied by a third number (C) will be equivalent to the sum of their products (A x C + B x C); for example: 2 x (4 + 3) = 2 x 4 + 2 x 3

#### Properly place the terms of the addition in natural numbers up to 99,999,999

How to build the algorithm of a vertical sum?

Next you will learn to construct vertical sums by placing the symbols "+" and "=" and each of their terms (addends and result) in the corresponding place, practicing with the different printable educational worksheets that we have developed for whole numbers from 0 to 99,999,999.

Remember, with the 6-digit and 7-digit additions you must always align, according to their place value, the ones (1s), the tens (10s), the hundreds (100s), the thousands (1,000s), the ten thousands (10,000s), the hundred thousands (100,000s) the millions (1,000,000s) and the ten millions (10,000,000s) before solving any addition operations.  #### Solve sums of two addends vertically without regrouping with natural numbers up to 99,999,999

How to add numbers up to eight digits without carrying?

We present a solved example as well as some printable PDF activities accompanied by their explanation so that you can easily learn how to add in vertical and without regrouping 7 and 8-digit numbers between 0 and the 100,000,000.

SPANISH ENGLISH      #### Solve sums of two addends vertically with regrouping with natural numbers up to 99,999,999

How to add numbers up to eight digits with carrying?

Practice the 7 and 8-digits addition with regrouping with the whole numbers from 0 to 100,000,000 from our printable worksheets and become a mathematical expert.

If you need a little preparation, watch our video lessons where we provide you with some solved examples following the vertical resolution method by columns.

SPANISH ENGLISH      We also provide you with a set of interactive games so that you can practice two-digit sums with carry from the personal computer (or desktop computer), the tablet and / or the mobile phone:

#### Solve sums of three addends vertically without regrouping with whole numbers up to 99,999,999

How to add 3 or more addends of up to 8 figures without carrying?

We explain step by step how to perform the calculations and how to find the result easily in the sums with three addends without carrying up to the ten millions.     #### Solve sums of three addends vertically with regrouping with whole numbers up to 99,999,999

How to add 3 or more addends of up to 8 figures with carrying?

Practice the addition of three addends with seven and eight digits and carried from our printable worksheets and with the natural numbers from 0 to 99,999,999.     #### Mentally solve simple addition facts with natural numbers up to 99,999,999

Show your logical-mathematical skills by solving our exercises with hidden or missing whole numbers and using mental calculation (also known as "mental math"). #### Solve addition word problems without regrouping with natural numbers up to 99,999,999

We have made some exercises so that you can practice solving addition word problems no carrying with the numbers from 0 to 100,000,000.

Para que te resulte más sencillo, te proporcionamos la explicación paso a paso y con ejemplos resueltos a través de un vídeo tutorial con sumas de hasta 8 dígitos.

SPANISH ENGLISH  #### Solve addition word problems with regrouping with whole numbers up to 99,999,999

Show that you are a math genius by solving each of our arithmetic problems using the basic operation of addition with carryover from 0 to 1,000,000,000.

If you need a little preparation, watch our video lessons where we provide you with some solved examples using the vertical column method.

SPANISH ENGLISH  #### Apply the commutative property of addition with natural numbers up to 99,999,999

Do you know what the Commutative Property of Addition is?

The Commutative Property of Addition is that universal mathematical law that states that "even if we change the order in which the addends are added, the result is always the same".

SPANISH ENGLISH   #### Apply the associative property of addition with natural numbers up to 99,999,999

Do you know what the Associative Property of the Addition is?

The Associative Property of addition is that universal mathematical law that tells us that "if we add three or more numbers, the result will always be the same regardless of the order in which we group the addends".

SPANISH ENGLISH   