Grade 3 Think Up Unit 2

Front

What does it mean to decompose a number?

Back

To break down or break apart into smaller parts.

Front

What is expanded notation?

Back

A way to write numbers that shows the digits as the sum of each digit multiplied by its place value.

Front

What does it mean to compose a number?

Back

To form a number or shape by putting parts together.

Front

What is expanded form?

Back

A way to write a number that shows the value of each digit.

Front

What is the value of a digit in a number?

Back

How much something is worth.

Front

How do you find the place value of a digit in a number?

Back

By determining its position in the number, which indicates its value.

Front

What is the difference between expanded form and expanded notation?

Back

Expanded form shows the value of each digit, while expanded notation shows the sum of each digit multiplied by its place value.

Front

Can you give an example of decomposing the number 123?

Back

123 can be decomposed into 100, 20, and 3.

Front

What is the purpose of using expanded notation?

Back

To understand the value of each digit in a number and how they contribute to the total.

Front

How would you compose the number 45 using its parts?

Back

By combining 40 and 5.