Investigations 3 in Number, Data, and Space, Student Activity Book [Grade 5]

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About the Mathematics in This Unit

Dear Family,

Our class is starting a new mathematics unit about decimals called Between 0 and 1. In this unit, students investigate the meaning of decimals. They develop an understanding of the relationships between fractions and decimals, and they use knowledge of number relationships and a variety of representations and models to compare and order decimals and to add and subtract decimals.

Throughout the unit, students work toward these goals:

Benchmarks/Goals Examples
Write, compare, and round decimals to thousandths.

What is the order of these decimals from least to greatest?

0.7, 0.333, 0.45

To solve this problem, I thought about tenths.

0.7 is seven tenths.

0.333 is a little more than three tenths.

0.45 is between four tenths and five tenths.

A number line shows the numbers 0.0 to 1.0 in increments of 0.1. d
Add and subtract decimals.

A jeweler has 3 small pieces of gold that weigh 2.2 grams, 1.06 grams, and 1.425 grams. How much gold does the jeweler have in all?

Estimate Solution

2.2 is close to 2.

1.06 is close to 1.

1.425 is close to 1 , and 1 half .

The answer should be about 4 , and 1 half or about 4.5.

table with 5 rows and 2 columns , row1 column 1 , 2 plus 1 plus 1 equals , column 2 4 , row2 column 1 , 0.2 plus 0.4 equals , column 2 0.6 , row3 column 1 , 0.06 , plus , 0.02 , equals , column 2 0.08 , column 2 modified plus , 0.005 with under bar below , column 2 4.685 , end table

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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Puzzles, Clusters, and Towers Unit 2 Prisms and Solids Unit 3 Rectangles, Clocks, and Tracks Unit 4 How Many People and Teams? Unit 5 Temperature, Height, and Growth Unit 6 Between 0 and 1 Unit 7 Races, Arrays, and Grids Unit 8 Properties of Polygons