Compute the Division: What is 1.3 Divided by 0.2?

Decimal Division with Reciprocal Method

1.3:0.2= 1.3:0.2=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 We'll multiply each factor by 10 to make division easier
00:24 We'll divide between the new numbers and calculate the quotient
00:32 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

1.3:0.2= 1.3:0.2=

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert each decimal to a fraction.
  • Step 2: Divide by converting to multiplication using reciprocals.
  • Step 3: Simplify the resulting fraction to find the solution.

Now, let's proceed with the calculations:

Step 1: Convert 1.3 1.3 and 0.2 0.2 to fractions:

  • 1.3=1310 1.3 = \frac{13}{10}
  • 0.2=210 0.2 = \frac{2}{10}

Step 2: Perform division by multiplying by the reciprocal:

1310÷210=1310×102 \frac{13}{10} \div \frac{2}{10} = \frac{13}{10} \times \frac{10}{2}

Step 3: Simplify the fractions:

  • Cancel the common factor of 10: 13×1010×2=132 \frac{13 \times 10}{10 \times 2} = \frac{13}{2}
  • Calculate the division: 132=6.5 \frac{13}{2} = 6.5

Therefore, the solution to the problem is 6.5 6.5 .

3

Final Answer

6.5 6.5

Key Points to Remember

Essential concepts to master this topic
  • Rule: Division by decimals equals multiplication by their reciprocal
  • Technique: Convert 1.3÷0.2 1.3 \div 0.2 to 1310×102 \frac{13}{10} \times \frac{10}{2}
  • Check: Multiply answer by divisor: 6.5×0.2=1.3 6.5 \times 0.2 = 1.3

Common Mistakes

Avoid these frequent errors
  • Dividing decimals directly without converting to fractions
    Don't try to divide 1.3 ÷ 0.2 by lining up decimal points = confusing placement and wrong answers! This leads to errors because decimal division rules are harder to track. Always convert to fractions first, then use reciprocal multiplication.

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 can't I just divide 1.3 by 0.2 directly?

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You can, but converting to fractions makes it much clearer! When you see 1310÷210 \frac{13}{10} \div \frac{2}{10} , you can easily spot that the 10s cancel out.

What does 'reciprocal' mean?

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A reciprocal means flipping the fraction! The reciprocal of 210 \frac{2}{10} is 102 \frac{10}{2} . When you multiply a number by its reciprocal, you always get 1.

How do I convert 1.3 to a fraction?

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Count the decimal places! 1.3 1.3 has 1 decimal place, so put it over 10: 1310 \frac{13}{10} . For 0.2, that's also 210 \frac{2}{10} .

Why do the 10s cancel out in this problem?

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Because we have 1310×102 \frac{13}{10} \times \frac{10}{2} ! The 10 in the numerator and 10 in the denominator cancel each other, leaving us with 132=6.5 \frac{13}{2} = 6.5 .

How can I check if 6.5 is correct?

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Multiply your answer by the original divisor: 6.5×0.2=1.3 6.5 \times 0.2 = 1.3 . Since this equals our original dividend, 6.5 is correct!

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