10 More, 10 Less
Aligned to 1.NBT.C.5 — Common Core State Standards for Mathematics.
What this lesson teaches
When we add 10, only the tens go up by one. When we take 10 away, only the tens go down by one. The ones stay the same.
Worked example
10 more than 34 is 44. 10 less than 34 is 24. See how only the tens digit changed?
Practice questions
- What is 10 more than 52?
- What is 10 less than 60?
- What is 10 more than 18?
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
10 más, 10 menos
Cuando sumamos 10, solo las decenas suben en uno. Cuando quitamos 10, solo las decenas bajan en uno. Las unidades no cambian.
Ejemplo: 10 más que 34 es 44. 10 menos que 34 es 24. ¿Ves cómo solo cambió el dígito de las decenas?
More Number & Operations in Base Ten lessons
Tens and Ones (Place Value)1.NBT.B.2Counting to 1201.NBT.A.1Which Is Bigger?1.NBT.B.3Adding Bigger Numbers1.NBT.C.4Subtracting Tens1.NBT.C.6
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