Adding and Subtracting within 1000

Aligned to 2.NBT.B.7 — Common Core State Standards for Mathematics.

What this lesson teaches

Add or subtract by working with hundreds, tens, and ones separately. Regroup when a place has more than 9 or not enough to take away.

325 + 143: ones 5+3=8; tens 20+40=60; hundreds 300+100=400; put together: 400 + 60 + 8 = 468.

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

Suma o resta trabajando por separado con centenas, decenas y unidades. Reagrupa cuando un lugar tenga más de 9 o no alcance para quitar.

Ejemplo: 325 + 143: unidades 5+3=8; decenas 20+40=60; centenas 300+100=400; une todo: 400 + 60 + 8 = 468.

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