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About the Mathematics in This Unit

Benchmark/Goals Examples
Find at least 5 combinations of a given number.

There are 9 vegetables on your plate. Some are peas. Some are carrots. How many of each could you have?

9 = 5 + 4

9 = 2 + 7

9 = 8 + 1

9 = 4 + 5

9 = 7 + 2

Solve story problems with three addends.

Mr. C's class was doing Quick Images. How many dots did they see?

Three dot cubes: dot cube with 3 dots, dot cube with 2 dots, dot cube with 3 dots.

Rote count, read, and write numbers to 120. A boy says: “87, 88, 89, 90, 91.” Beneath this, the same numbers are handwritten.
Represent numbers with equivalent expressions.

Today's Number: 10

10 = 3 + 7 20 − 10 = 10 2 + 2 + 6 = 10

In our math class, students engage in math problems and activities and discuss the underlying concepts. They are asked to share their reasoning and solutions. It is important that children solve math problems accurately in ways that make sense to them. At home, encourage your child to explain his or her math thinking to you.

In the coming weeks, you will receive more information about the mathematics in this unit as well as suggested activities to do at home.


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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Building Numbers and Solving Story Problems Unit 2 Comparing and Combining Shapes Unit 3 How Many of Each? How Many in All? Unit 4 Fish Lengths and Fraction Rugs Unit 5 Number Games and Crayon Problems Unit 6 Would You Rather Be an Eagle or a Whale? Unit 7 How Many Tens? How Many Ones? Unit 8 Blocks and Buildings