VideoGist - SUMA Y RESTA DE NÚMEROS ENTEROS

SUMA Y RESTA DE NÚMEROS ENTEROS

julioprofe

3 min, 51 sec

The video explains the rules for adding and subtracting integers, including dealing with parentheses and sign rules.

Summary

When dealing with integers of opposite signs, subtract the smaller number from the larger and keep the sign of the larger.
If the signs are the same, add the absolute values and keep the common sign.
To resolve parentheses with a negative sign in front, apply the sign rule to negate the inside.
Opposite numbers cancel each other out, resulting in zero.
The rules are demonstrated with several examples to illustrate the process.

Chapter 1

0:00 - 33 sec

Subtraction of integers with opposite signs is explained with an example.

Subtract the smaller integer from the larger when they have opposite signs.
The result takes the sign of the larger integer, demonstrated with -13 + 11 equaling -2.

Chapter 2

0:33 - 30 sec

Addition of integers with the same sign is explained using an example.

Chapter 3

1:03 - 1 min, 18 sec

Continuation of subtraction rules with opposite signs using different examples.

When subtracting with opposite signs, the result takes the sign of the larger integer.
Examples include -21 + 43 resulting in 22 and -35 + 40 resulting in -5.

Chapter 4

2:22 - 42 sec

Application of the sign rule for parentheses and explanation of number opposites.

Apply the sign rule to resolve parentheses, as in the case of -7 - 21 resulting in -14.
Number opposites cancel each other out, yielding zero, as demonstrated with -22 + 22.

Chapter 5

3:04 - 45 sec

Explanation of addition and subtraction for natural numbers and concluding examples.

Natural numbers are added in the usual way, as shown with 14 + 18 equaling 32.
When both integers are negative, their absolute values are added, and the result is negative, as with -29 - 31 equaling -60.