Rows and Columns in a Rectangle
Aligned to 2.G.A.2 — Common Core State Standards for Mathematics.
What this lesson teaches
You can split a rectangle into equal squares that make rows going across and columns going down. Count all the squares to find the total.
Worked examples
Example 1
A rectangle has 2 rows and 3 columns of squares. Count them: 3 + 3 = 6 squares in all.
Example 2
A rectangle with 4 rows and 5 columns holds 5 + 5 + 5 + 5 = 20 squares.
Example 3
The squares must all be the same size. If some are bigger, counting them does not tell you how the rectangle is split.
Practice questions
- A rectangle has 3 rows and 4 columns. How many squares in all?
- If there are 2 rows of 5 squares, how many squares total?
- Draw a rectangle split into 2 rows and 2 columns. How many squares?
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
Filas y columnas en un rectángulo
Puedes separar un rectángulo en cuadrados iguales que forman filas horizontales y columnas verticales. Cuenta todos los cuadrados para hallar el total.
Ejemplo 1: Un rectángulo tiene 2 filas y 3 columnas de cuadrados. Cuéntalos: 3 + 3 = 6 cuadrados en total.
Ejemplo 2: Un rectángulo con 4 filas y 5 columnas tiene 5 + 5 + 5 + 5 = 20 cuadrados.
Ejemplo 3: Todos los cuadrados deben ser del mismo tamaño. Si algunos son más grandes, contarlos no te dice cómo está dividido el rectángulo.
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