Which Is Bigger?

Aligned to 1.NBT.B.3 — Common Core State Standards for Mathematics.

What this lesson teaches

To compare two numbers, first look at the tens. The number with more tens is bigger. We use > for greater, < for less, and = for equal.

Example 1

Compare 34 and 28. 34 has 3 tens, 28 has 2 tens. 3 tens is more, so 34 > 28.

Example 2

Compare 46 and 49. Both have 4 tens, so look at the ones: 6 is less than 9, so 46 < 49.

Example 3

Compare 30 and 29. 30 has 3 tens and 29 has only 2 tens, so 30 > 29 even though 9 is bigger than 0.

Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.

Para comparar dos números, primero mira las decenas. El número con más decenas es más grande. Usamos > para mayor, < para menor y = para igual.

Ejemplo 1: Compara 34 y 28. 34 tiene 3 decenas, 28 tiene 2 decenas. 3 decenas es más, así que 34 > 28.

Ejemplo 2: Compara 46 y 49. Los dos tienen 4 decenas, así que mira las unidades: 6 es menos que 9, entonces 46 < 49.

Ejemplo 3: Compara 30 y 29. 30 tiene 3 decenas y 29 solo tiene 2, entonces 30 > 29 aunque el 9 sea mayor que el 0.

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