Operations with Expressions and Signs

This video tutorial from 'Mate Fácil' explains how to correctly perform combined operations involving addition, subtraction, and multiplication. It highlights common mistakes, such as performing operations from left to right without following the correct order of operations. The video provides examples to demonstrate the importance of performing multiplication before addition and subtraction. It also introduces the use of parentheses to avoid confusion with the multiplication symbol. The tutorial concludes with exercises for practice and encourages viewers to engage with the content by liking, subscribing, and commenting.

What is a common mistake people make when performing combined operations?

• Starting with addition

• Starting with subtraction

• Starting with multiplication

• Starting with division

In the expression 1 + 2 x 3 + 4, which operation should be performed first?

• 2 x 3

• 1 + 2

• 3 + 4

• 1 + 4

What is the correct result of the expression 1 + 2 x 3 + 4?

• 9

• 11

• 13

• 7

In the expression 7 x 2 - 3 x 5, what is the result after performing the multiplications?

• 7 - 3

• 14 - 3

• 7 - 15

• 14 - 15

What is the final result of the expression 7 x 2 - 3 x 5?

• 2

• -2

• -1

• 1

Why is it important to use parentheses in algebraic expressions?

• To avoid confusion with the letter 'x'

• To make the expression longer

• To change the order of operations

• To simplify the expression

In the expression 3(-1) - 2(-5), what is the result of the first multiplication?

• 1

• 3

• -1

• -3

What is the result of the expression 3(-1) - 2(-5)?

• 7

• -7

• 5

• -5

What should be done when two numbers with different signs are added?

• Divide their absolute values

• Subtract their absolute values

• Add their absolute values

• Multiply their absolute values

What should you do if you have any questions or suggestions about the video?

• Ask a friend

• Ignore them

• Leave them in the comments

• Email the teacher