# Lesson 4

Exploremos relaciones entre valores posicionales (optional)

### Lesson Purpose

### Lesson Narrative

In previous lessons, students represented 1 tenth, 1 hundredth, and 1 thousandth as fractions, decimals, with words and in expanded form. The purpose of this optional lesson is to use the context of weight to further understand and relate these different ways to represent a decimal number (MP2). The weights make the expanded form of a decimal tangible and also help to explain the word form which, in the weight context, represents using all weights of the smallest size (one thousandth for a decimal to the thousandths).

The third activity in the lesson focuses on the multiplicative relationships between the different place values, again shown by the weights. In particular, 1 tenth is equivalent to 10 hundredths and 1 hundredth is equivalent to 10 thousandths. These relationships will be explored further in the next unit, but students use these relationships throughout this unit as they work with decimals and perform arithmetic with decimals.

- Representation

- MLR1

### Learning Goals

Teacher Facing

- Explore place value relationships between tenths, hundredths, and thousandths.

### Student Facing

- Exploremos relaciones entre valores posicionales.

### Required Preparation

Activity 1:

- If needed, give students access to the hundredths grid.

### CCSS Standards

Addressing

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 15 min |

Activity 2 | 10 min |

Activity 3 | 10 min |

Lesson Synthesis | 10 min |

Cool-down | 5 min |

### Teacher Reflection Questions

### Suggested Centers

- Tic Tac Round (3–5), Stage 3: Decimals (Addressing)
- Greatest of Them All (1–5), Stage 4: Decimals (Addressing)
- Jump the Line (2–5), Stage 2: Add and Subtract Tenths and Hundredths (Supporting)