Reading and Writing Numbers to 1000
Aligned to 2.NBT.A.3 — Common Core State Standards for Mathematics.
What this lesson teaches
You can write a number three ways: as digits, in words, and in expanded form that shows each place added up.
Worked examples
Example 1
The number 256 is 'two hundred fifty-six' in words, and 200 + 50 + 6 in expanded form.
Example 2
The number 408 is 'four hundred eight' in words, and 400 + 8 in expanded form. There are no tens, so nothing is written for that place.
Example 3
Expanded form shows what each digit is really worth: 917 is 900 + 10 + 7, not 9 + 1 + 7.
Practice questions
- Write 473 in words.
- Write 'three hundred eight' as a number.
- Write 615 in expanded form.
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
Leer y escribir números hasta 1000
Puedes escribir un número de tres maneras: con dígitos, con palabras y en forma desarrollada que muestra cada lugar sumado.
Ejemplo 1: El número 256 es 'doscientos cincuenta y seis' en palabras, y 200 + 50 + 6 en forma desarrollada.
Ejemplo 2: El número 408 es 'cuatrocientos ocho' en palabras, y 400 + 8 en forma desarrollada. No hay decenas, así que nada se escribe en ese lugar.
Ejemplo 3: La forma desarrollada muestra lo que vale de verdad cada dígito: 917 es 900 + 10 + 7, no 9 + 1 + 7.
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