Divide Whole Numbers by Fractions

6.NOS.1 · Unit 2 · Lesson 2

Name   Period

Objectives / Objetivos

Content Objective: I can divide a whole number by a fraction by multiplying by the reciprocal.

Language Objective: I can explain my steps using the words fraction, reciprocal, quotient, and Keep, Change, Flip.

Key Idea / Idea clave

Dividing by a fraction is the same as multiplying by its reciprocal (the fraction flipped over).

I Notice / Observo

  • How much total powder does Agent Park have?
  • How much goes into each bag?

I Wonder / Me pregunto

  • Why does dividing by 1/2 give a number larger than 4?

Vocabulary / Vocabulario

Term / TérminoDefinition / Definición
Whole Number
Número entero		A counting number with no fraction or decimal, like 0, 1, 2, 3.
Un número de contar sin fracción ni decimal, como 0, 1, 2, 3.
Fraction
Fracción		A number that shows part of a whole, like 3/4.
Un número que muestra una parte de un todo, como 3/4.
Reciprocal
Recíproco		A fraction turned upside down.
Una fracción volteada de arriba abajo.
Keep, Change, Flip
Mantener, cambiar, invertir		A way to divide fractions: keep the first, change ÷ to ×, flip the second.
Una manera de dividir fracciones: deja la primera, cambia ÷ por ×, voltea la segunda.
Quotient
Cociente		The answer when you divide.
La respuesta cuando divides.

Practice Preview / Vista previa de práctica

  1. What is 6 ÷ 1/3?
    1. 18
    2. 2
    3. 6/3
    4. 3
  2. Complete the table: Whole Number ÷ Fraction. Use Keep, Change, Flip.
  3. Match each division expression to its quotient.
  4. Find the Division Error
    1. Step 1: Problem — 6 ÷ 2/3
    2. Step 2: Keep, Change, Flip — 6 × 2/3
    3. Step 3: Multiply — 12/3
    4. Step 4: Simplify — 4

    Which step has the mistake? Explain it and write the correct work.

Reflection / Reflexión

One thing I learned today / Una cosa que aprendí hoy: