Solve the Division Problem: 15.2 ÷ 100 Decimal Calculation

Decimal Division with Powers of 10

15.2:100= 15.2:100=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:04 According to the number of zeros, move the decimal point
00:13 Move the decimal point according to the number of zeros
00:23 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

15.2:100= 15.2:100=

2

Step-by-step solution

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

  • Step 1: Identify the given information
  • Step 2: Perform the division by shifting the decimal
  • Step 3: Determine the correct answer choice

Now, let's work through each step:
Step 1: We are given 15.2 15.2 and need to divide by 100 100 .
Step 2: Since dividing by 100 100 involves moving the decimal point two places to the left, we take 15.2 15.2 and shift the decimal to get 0.152 0.152 .
Step 3: Comparing our result with the answer choices, 0.152 0.152 corresponds to choice id 3 3 .

Therefore, the solution to the problem is 0.152 0.152 .

3

Final Answer

0.152 0.152

Key Points to Remember

Essential concepts to master this topic
  • Rule: Dividing by 100 moves decimal point 2 places left
  • Technique: From 15.2 ÷ 100, shift decimal: 15.2 → 1.52 → 0.152
  • Check: Multiply result by 100: 0.152 × 100 = 15.2 ✓

Common Mistakes

Avoid these frequent errors
  • Moving decimal point in wrong direction
    Don't move the decimal point right when dividing by 100 = 1520 instead of 0.152! This makes the number bigger instead of smaller. Always move left when dividing by powers of 10.

Practice Quiz

Test your knowledge with interactive questions

\( \text{0}.07\times10= \)

FAQ

Everything you need to know about this question

Why does dividing by 100 move the decimal 2 places?

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Because 100 has 2 zeros! Each zero represents moving the decimal one place left. So 100 = 2 places, 1000 = 3 places, and so on.

What if I don't have enough digits to move left?

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Add zeros as placeholders! For example, 5.2 ÷ 100 becomes 05.2, then move left twice to get 0.052.

How is this different from multiplying by 100?

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It's the opposite direction! Multiplying by 100 moves decimal 2 places right (makes bigger), while dividing moves 2 places left (makes smaller).

Can I use long division instead?

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You could, but the decimal shifting method is much faster and easier! Long division would give the same answer but take much longer.

What if the answer choices don't match my result?

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Double-check your decimal movement! Count carefully: one place, two places. The most common error is moving the wrong number of places.

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