Pre-Algebra : One-Step Equations with Decimals

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #71 : One Step Equations With Decimals

Solve.

Possible Answers:

Correct answer:

Explanation:

   
   
    
  



Multiply the numbers as you would any three-digit numbers, ignoring the decimal points. After adding the three lines together, place the decimal point however many spots from the right as there are decimal points moved from the right in the original equation. Because both 10.8 and 22.3 have decimals one over from the right of the number, totaling two decimals over, you will move the decimal over two decimal places in the final solution.

Example Question #72 : One Step Equations With Decimals

Solve for :

Possible Answers:

Correct answer:

Explanation:

The goal is to isolate the variable on one side.

The opposite operation of division is multiplication, therefore , multiply each side by 0.5:

The left hand side can be reduced by recalling that anything divided by itself is equal to 1:

The identity law of multiplication takes effect and we get the solution as:

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