Pre-Algebra : Pre-Algebra

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #12 : One Step Equations With Decimals

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Subtract both sides by 

Example Question #13 : One Step Equations With Decimals

Possible Answers:

Correct answer:

Explanation:

 Add both sides by 

Example Question #314 : Algebraic Equations

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Add both sides by . Remember,  can also be written as 

Example Question #14 : One Step Equations With Decimals

Solve for 

Possible Answers:

Correct answer:

Explanation:

 Add both sides by 

Example Question #15 : One Step Equations With Decimals

Solve for .

 

Possible Answers:

Correct answer:

Explanation:

 Divide both sides by . Both decimals each have one decimal place so the expression becomes: .

Example Question #317 : Algebraic Equations

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Divide both sides by . Both decimals each have one decimal place so the expression becomes: .

Example Question #318 : Algebraic Equations

Possible Answers:

Correct answer:

Explanation:

 Divide both sides by . Both decimals each have one decimal place so the expression becomes: . When dividing negative values, we count the number of negative values. Since there's two, the answer is positive. 

Example Question #21 : One Step Equations With Decimals

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Divide both sides by .  can also be expressed as . Both decimals each have one decimal place so the expression becomes: .  

Example Question #22 : One Step Equations With Decimals

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Divide both sides by .  The denominator has less decimal places than the numerator so we just shift one decimal place for top and bottom: .  

Example Question #23 : One Step Equations With Decimals

Solve for 

Possible Answers:

Correct answer:

Explanation:

 Multiply both sides by . When multiplying decimals, first multiply normally and then count the number of decimal places in the problem. We have . So starting from the right, we shift two places to the left to get a decimal of 

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