Solve the Division Expression: 118:100 Step-by-Step

Division by Powers of 10

118:100= 118:100=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 According to the number of zeros, move the decimal point
00:10 Move the decimal point by the number of zeros
00:20 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

118:100= 118:100=

2

Step-by-step solution

To solve this problem, we need to divide 118 118 by 100 100 . To do this, we'll use the method of moving the decimal point.

The number 118 118 can be expressed as 118.0 118.0 with an implied decimal point at the end. When dividing by 100 100 , which is 102 10^2 , we move the decimal point two places to the left to find the quotient.

  • First Place: 118.011.80 118.0 \to 11.80
  • Second Place: 11.801.180 11.80 \to 1.180

After moving the decimal two places to the left, the result becomes 1.18 1.18 .

Therefore, the solution to the problem is 1.18 1.18 .

3

Final Answer

1.18 1.18

Key Points to Remember

Essential concepts to master this topic
  • Rule: Dividing by 100 moves decimal point two places left
  • Technique: 118÷100=118.01.18 118 \div 100 = 118.0 \to 1.18
  • Check: Multiply answer by divisor: 1.18×100=118 1.18 \times 100 = 118

Common Mistakes

Avoid these frequent errors
  • Moving decimal point in wrong direction
    Don't move the decimal point to the right when dividing by 100 = 11,800 11,800 ! This multiplies instead of divides and gives a huge wrong answer. Always move decimal left when dividing by powers of 10.

Practice Quiz

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Solve the following exercise:

22.1-12.0

FAQ

Everything you need to know about this question

Why do I move the decimal point left when dividing by 100?

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Because you're making the number smaller! Division reduces values, so 118÷100 118 \div 100 must be less than 118. Moving left gives smaller results.

How many places do I move for different powers of 10?

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Count the zeros! 10 = 1 zero = 1 place left, 100 = 2 zeros = 2 places left, 1000 = 3 zeros = 3 places left, and so on.

What if there's no decimal point shown in the number?

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Every whole number has an invisible decimal point at the end! So 118 is really 118.0 118.0 - now you can move it left as needed.

Can I use long division instead?

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Yes, but moving the decimal is much faster! Long division with 118÷100 118 \div 100 gives the same answer but takes more time and steps.

How do I know my decimal point is in the right place?

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Use the reverse check: multiply your answer by 100. If you get back to 118, your decimal placement is perfect!

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