Maths Integers part 11 (Multiply 3 Integers) CBSE Class 7 Mathematics VII

TL;DR

This video explains how to multiply three integers, including scenarios with negative and positive integers.

Transcript

hello friends this video on integers part 11 is brought to you by exam for calm no more fear from exam let us now see how to be multiplied three integers still now we have learned about handling two integers at a time may be a positive integer with a positive integer or a positive integer with a negative integer or a negative with a negative intege... Read More

Key Insights

• ✖️ Multiplying two positive integers results in a positive number.
• ❎ When multiplying three negative integers, the result is negative if the number of negative integers is odd.
• ✖️ If the number of negative integers being multiplied is even, the result will be positive.
• 🤘 The rule for the sign of the result applies regardless of the specific numbers being multiplied.
• ❎ A negative integer multiplied by a positive integer results in a negative number.
• 🤘 The order of multiplication does not affect the sign of the result.
• ✖️ The result of multiplying three integers follows a pattern based on the number of negative integers being multiplied.

Questions & Answers

Q: How do you multiply three integers with different signs?

When multiplying a negative integer with two positive integers, you can multiply the positive integers first and then add a negative sign to the result. For example, -3 x 2 x 2 = -12.

Q: What happens when you multiply three negative integers?

When multiplying three negative integers, you multiply the first two, which will result in a positive number. Then, you multiply this positive number with the third negative integer and add a negative sign to the result. For example, -3 x -3 x -3 = -27.

Q: What is the rule for the sign of the result when multiplying negative integers?

If the number of negative integers being multiplied is even, the result will be positive. If the number of negative integers is odd, the result will be negative.

Q: Does the rule for the sign of the result apply when the numbers are different?

Yes, the rule applies regardless of whether the numbers being multiplied are the same or different. It solely depends on the number of negative integers being multiplied.

Summary & Key Takeaways

• The video discusses the process of multiplying three integers, using different scenarios.

• When multiplying two positive integers, the result is positive.

• When multiplying two negative integers, the result is positive if the number of negative integers is even, and negative if it is odd.