Science Class 8 Subject and Purpose Quiz
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Questions and Answers

Which grade level is the text referring to?

  • Grade 9
  • Grade 6
  • Grade 7
  • Grade 8 (correct)

What is the main subject of the text?

  • Physics (correct)
  • Biology
  • Earth Science
  • Chemistry

What is the purpose of the text?

  • To discuss the history of science
  • To promote a scientific event
  • To provide information about a science class (correct)
  • To introduce a new scientific concept

What is the value of $5(7 + 3)$?

<p>50 (C)</p> Signup and view all the answers

What is the square root of 144?

<p>12 (D)</p> Signup and view all the answers

What is the result of $18 / 2(2 + 1)$?

<p>3 (B)</p> Signup and view all the answers

What is the result of $6 / 2(1 + 1)$?

<p>3 (D)</p> Signup and view all the answers

What is the value of $4(5 - 2) + 8$?

<p>20 (D)</p> Signup and view all the answers

What is the square root of 196?

<p>10 (C)</p> Signup and view all the answers

Flashcards

Order of Operations

The order of operations defines the sequence in which calculations are performed in a mathematical expression. It ensures that every equation has only one correct solution.

Multiplication and Division Priority

Multiplication and division have the same priority in the order of operations. When they appear in an expression, they are performed from left to right.

Addition and Subtraction Priority

Addition and subtraction have the same priority in the order of operations. When they appear in an expression, they are performed from left to right.

Square Root

A square root of a number is a value that, when multiplied by itself, equals the original number.

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Squaring a Number

Multiplying a number by itself.

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Numerical Expression

A numerical expression is a combination of numbers and mathematical operations.

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Simplifying a Numerical Expression

Simplifying a numerical expression means performing the operations to find a single numerical answer.

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Parentheses in Numerical Expressions

Parentheses in a numerical expression indicate that the operations within them should be performed first.

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Solving Complex Calculations

The order of operations can be applied to solve complex calculations, resulting in a single numerical value.

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Study Notes

Mathematics Operations

  • The text is referring to a middle school grade level, likely 6-8.
  • The main subject of the text is mathematics, specifically order of operations and calculations.
  • The purpose of the text is to provide practice problems for students to apply mathematical operations.

Calculations

  • The value of $5(7 + 3)$ is 50.
  • The square root of 144 is 12.
  • The result of $18 / 2(2 + 1)$ is 6.
  • The result of $6 / 2(1 + 1)$ is 3.
  • The value of $4(5 - 2) + 8$ is 16.
  • The square root of 196 is 14.

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