Lesson 6 of 14
Every column is a power of ten
Show on a big screenA bill says ₹4,073. What does each digit count?
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4,073 — four digits. Step 1 of 4
4,073— four digits.- Columns:
10³ 10² 10¹ 10⁰. - Digits:
4 0 7 3. 4000 + 0 + 70 + 3= 4073.
The rule
The 4 counts thousands. The 0 counts hundreds. The 7 counts tens. The 3 counts ones.
Every place-value column is a power of ten. Number the columns from the right, starting at 0. The ones column is column 0, so it is 10⁰.
4,073 = 4×10³ + 0×10² + 7×10¹ + 3×10⁰. The 0 means no hundreds. Without it, the 4 would be in the hundreds column.
| Column | Power |
|---|---|
| Ones | 10⁰ |
| Tens | 10¹ |
| Hundreds | 10² |
| Thousands | 10³ |
| Ten thousands | 10⁴ |
| Lakhs | 10⁵ |
Try the lab to finish this lesson.