Understanding Integers and Their Operations

This video tutorial covers the topic of integers, aimed at 7th-grade students. It begins with an introduction to integers, including positive, negative numbers, and zero. The tutorial then explains how to compare and order integers using a number line. It covers operations with integers, such as addition, subtraction, multiplication, and division, emphasizing the rules for handling positive and negative signs. The video also teaches how to find the least common multiple (LCM) and greatest common divisor (GCD) using prime factorization. Finally, it discusses the powers of integers, focusing on squares and cubes, and provides strategies for calculating these efficiently.

What is an integer?

• A number that is only negative.

• A number that is only positive.

• A number that is either positive or negative, including zero.

• A number that is a fraction.

On a number line, which direction do numbers increase?

• Downwards

• Upwards

• To the right

• To the left

Which of the following is true about comparing integers?

• Zero is less than any positive number.

• Negative numbers are always greater than positive numbers.

• Zero is greater than any negative number.

• Positive numbers are always less than negative numbers.

What is the result of multiplying a positive number by a negative number?

• A negative number

• Zero

• A positive number

• It depends on the numbers

What is the rule for adding two numbers with different signs?

• Add the numbers and keep the sign of the larger number.

• Add the numbers and keep the sign of the smaller number.

• Subtract the numbers and keep the sign of the larger number.

• Subtract the numbers and keep the sign of the smaller number.

What is the LCM of 12 and 15?

• 30

• 60

• 45

• 90

Which of the following is a prime factor of 45?

• 3

• 2

• 6

• 4

What is the square of 7?

• 14

• 21

• 77

• 49

What is the cube root of 27?

• 3

• 9

• 6

• 12

Which number is a perfect cube?

• 8

• 10

• 12

• 14