Solve Decimal Division: 0.5 ÷ 0.2 Step-by-Step

Decimal Division with Whole Number Multiplication

0.5:0.2= 0.5:0.2=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:04 Let's multiply each factor by 10, to make it easier to divide
00:23 We'll divide between the new numbers and calculate the quotient
00:27 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

0.5:0.2= 0.5:0.2=

2

Step-by-step solution

To solve the division of decimals 0.5÷0.2 0.5 \div 0.2 , follow these tried and true steps:

  • **Step 1:** Multiply both the dividend 0.5 0.5 and the divisor 0.2 0.2 by 10 to remove the decimal points. This transforms the problem into an equivalent with whole numbers: 5÷2 5 \div 2 .

  • **Step 2:** Perform the division of the resulting whole numbers: 5÷2=2.5 5 \div 2 = 2.5 .

  • **Step 3:** Thus, the answer to the original division problem 0.5÷0.2 0.5 \div 0.2 is 2.5 2.5 .

Therefore, the solution to the problem is 2.5 2.5 .

3

Final Answer

2.5 2.5

Key Points to Remember

Essential concepts to master this topic
  • Rule: Multiply both dividend and divisor by same power of 10
  • Technique: Convert 0.5÷0.2 0.5 \div 0.2 to 5÷2=2.5 5 \div 2 = 2.5 by multiplying by 10
  • Check: Verify 2.5×0.2=0.5 2.5 \times 0.2 = 0.5 to confirm the answer ✓

Common Mistakes

Avoid these frequent errors
  • Only removing decimals from one number
    Don't multiply just 0.5 by 10 to get 5 ÷ 0.2 = 25! This changes the value of the division completely. Always multiply both the dividend AND divisor by the same power of 10 to keep the division equivalent.

Practice Quiz

Test your knowledge with interactive questions

Solve the following exercise:

22.1-12.0

FAQ

Everything you need to know about this question

Why do I multiply both numbers by 10 instead of just one?

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Multiplying both numbers by the same amount keeps the division equivalent! Think of it like this: 0.50.2=0.5×100.2×10=52 \frac{0.5}{0.2} = \frac{0.5 \times 10}{0.2 \times 10} = \frac{5}{2} . The value stays the same.

What if the decimals have different numbers of decimal places?

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Multiply by the highest power of 10 needed! For example, with 0.25 ÷ 0.3, multiply both by 100 to get 25 ÷ 30, since 0.25 has two decimal places.

Can I just move the decimal points instead of multiplying?

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Yes! Moving decimal points is the same as multiplying by powers of 10. Just make sure you move the same number of places in both numbers.

How do I know my final answer is correct?

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Use multiplication to check: multiply your answer by the divisor. For 0.5÷0.2=2.5 0.5 \div 0.2 = 2.5 , check that 2.5×0.2=0.5 2.5 \times 0.2 = 0.5

What if I get a long decimal answer?

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That's normal! Some decimal divisions give repeating decimals or long decimal answers. Round to a reasonable number of decimal places as needed.

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