Dividing by Two-Digit Numbers
Aligned to 5.NBT.B.6 — Common Core State Standards for Mathematics.
What this lesson teaches
To divide by a two-digit number, take away easy chunks of the divisor at a time. Ask how many groups of the divisor fit, subtract that much, then keep going with what is left. Add up the chunks to get the quotient.
Worked example
Divide 4,325 ÷ 25. First take 100 groups: 25 × 100 = 2,500, leaving 4,325 − 2,500 = 1,825. Next take 70 groups: 25 × 70 = 1,750, leaving 1,825 − 1,750 = 75. Then 3 groups: 25 × 3 = 75, leaving 0. Add the chunks: 100 + 70 + 3 = 173. So 4,325 ÷ 25 = 173.
Practice questions
- Divide 288 ÷ 12.
- Divide 1,296 ÷ 12.
- Divide 3,672 ÷ 18 and show the chunks you subtracted.
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
Dividir entre números de dos dígitos
Para dividir entre un número de dos dígitos, quita bloques fáciles del divisor por partes. Pregúntate cuántos grupos del divisor caben, resta esa cantidad y sigue con lo que queda. Suma los bloques para obtener el cociente.
Ejemplo: Divide 4,325 ÷ 25. Primero quita 100 grupos: 25 × 100 = 2,500, y queda 4,325 − 2,500 = 1,825. Luego quita 70 grupos: 25 × 70 = 1,750, y queda 1,825 − 1,750 = 75. Después 3 grupos: 25 × 3 = 75, y queda 0. Suma los bloques: 100 + 70 + 3 = 173. Así, 4,325 ÷ 25 = 173.
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