Math is Exploring and Thinking

5.NF.B.4 · Unit 1 · Lesson 2

Name   Period

Objectives / Objetivos

Content Objective: I can make sense of a problem, plan a strategy, and use fractions of a whole number to compare quantities.

Language Objective: I can explain my plan using the words we know, we don't know, and my strategy is ___ .

Key Idea / Idea clave

Math Practices: Sense Making & Strategy Planning. 1. Identify known quantities and the unknown question. 2. Choose a strategy (draw a model, write an equation, or build a table). 3. Evaluate progress and pivot to an alternate approach if needed

Vocabulary / Vocabulario

Term / TérminoDefinition / Definición
quantity
cantidad		An amount in a problem — a number with a meaning attached, like 540 meters.
Una cantidad en un problema: un número con un significado, como 540 metros.
relationship
relación		How two quantities compare or connect to each other.
Cómo se comparan o se conectan dos cantidades entre sí.
strategy
estrategia		A plan for how to solve a problem before you start computing.
Un plan para resolver un problema antes de empezar a calcular.
reasonable
razonable		A solution that makes sense in the context of the problem.
Una solución que tiene sentido en el contexto del problema.
persevere
perseverar		To keep working on a problem, checking your progress and adjusting your plan when you get stuck.
Seguir trabajando en un problema, revisando tu progreso y ajustando tu plan cuando te atascas.

Practice Preview / Vista previa de práctica

  1. Which of these is a correct way to decompose 105.76?
    1. 100 + 5.76
    2. 100 + 5.076
    3. 105 + 7.6
    4. 10 + 5.76
  2. The Rio de Janeiro building will be 9/10 as tall as One World Trade Center (540 meters). How tall will it be?
    1. 486 meters
    2. 54 meters
    3. 4,860 meters
    4. 594 meters
  3. The Tokyo building will be 6/5 as tall as One World Trade Center (540 meters). How tall will it be?
    1. 648 meters
    2. 450 meters
    3. 108 meters
    4. 432 meters
  4. Which set shows FIVE different correct decompositions of 105.76?
    1. 100 + 5.76, 105 + 0.76, 110 − 4.24, 52.88 × 2, 211.52 ÷ 2
    2. 100 + 5.76, 105 + 7.6, 110 − 4.24, 52.88 × 2, 211.52 ÷ 2
    3. 100 + 5.76, 105 + 0.76, 110 + 4.24, 52.88 × 2, 211.52 ÷ 2
    4. 100 + 5.76, 105 + 0.76, 110 − 4.24, 52.88 × 3, 211.52 ÷ 2

Reflection / Reflexión

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