Hundreds, Tens, and Ones
Aligned to 2.NBT.A.1 — Common Core State Standards for Mathematics.
What this lesson teaches
In a three-digit number, each digit tells a place. The first digit counts hundreds, the middle counts tens, and the last counts ones.
Worked examples
Example 1
In 342: the 3 means 3 hundreds (300), the 4 means 4 tens (40), and the 2 means 2 ones (2).
Example 2
In 705: the 7 means 7 hundreds (700), the 0 means no tens, and the 5 means 5 ones.
Example 3
The 4 in 400 is worth 400, but the 4 in 34 is worth only 4. Same digit, different place, very different value.
Practice questions
- In 528, what does the 5 stand for?
- How many tens are in 176?
- Which digit is in the ones place in 409?
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Centenas, decenas y unidades
En un número de tres dígitos, cada dígito indica un lugar. El primer dígito cuenta centenas, el de en medio cuenta decenas y el último cuenta unidades.
Ejemplo 1: En 342: el 3 significa 3 centenas (300), el 4 significa 4 decenas (40) y el 2 significa 2 unidades (2).
Ejemplo 2: En 705: el 7 significa 7 centenas (700), el 0 significa que no hay decenas, y el 5 significa 5 unidades.
Ejemplo 3: El 4 en 400 vale 400, pero el 4 en 34 vale solo 4. El mismo dígito, distinto lugar, valor muy distinto.
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