Measuring with Cubes
Aligned to 1.MD.A.2 — Common Core State Standards for Mathematics.
What this lesson teaches
We can measure how long something is by laying same-size units end to end, with no gaps and no overlaps. Then we count the units.
Worked examples
Example 1
A pencil is as long as 6 cubes laid in a row. So the pencil is 6 cubes long.
Example 2
A book is as long as 9 cubes laid in a row, so the book is 9 cubes long.
Example 3
If your cubes overlap, you will count too many. Each cube must start exactly where the last one ended.
Practice questions
- A crayon is 4 cubes long and a marker is 7 cubes long. Which is longer?
- If a book is 9 paper clips long, how many paper clips is that?
- Why should the cubes have no gaps between them?
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
Medir con cubos
Podemos medir qué tan largo es algo poniendo unidades del mismo tamaño una tras otra, sin espacios y sin encimarlas. Luego contamos las unidades.
Ejemplo 1: Un lápiz es tan largo como 6 cubos puestos en fila. Así que el lápiz mide 6 cubos de largo.
Ejemplo 2: Un libro es tan largo como 9 cubos puestos en fila, así que el libro mide 9 cubos de largo.
Ejemplo 3: Si tus cubos se enciman, vas a contar de más. Cada cubo debe empezar exactamente donde terminó el anterior.
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