# Section B: Practice Problems Tens and Ones

## Section Summary

## Details

We learned that two-digit numbers are made up of tens and ones.

We represented two-digit numbers in many different ways.

6 tens and 5 ones

65

We added two-digit numbers by thinking about counting on by 10 or adding more tens.

## Problem 1 (Lesson 6)

How many connecting cubes are there?

How many connecting cubes are there?

Which collection did you prefer to count? Why?

## Problem 2 (Lesson 7)

How many connecting cubes are there?

Show your thinking using drawings, numbers, or words.How many connecting cubes are there?

Show your thinking using drawings, numbers, or words.How are the numbers the same? How are they different?

## Problem 3 (Lesson 8)

Circle **3** representations of 63.

6 tens and 3 tens

6 tens and 3 ones

## Problem 4 (Lesson 9)

Show the number of connecting cubes in as many ways as you can.

## Problem 5 (Lesson 10)

Write the number that matches each representation.

## Problem 6 (Lesson 11)

Find the number that makes each equation true.

Show your thinking using drawings, numbers, or words.

## Problem 7 (Lesson 12)

Find the value of each expression.

What patterns do you notice?

## Problem 8 (Exploration)

Tyler drew this representation of 57.

What do you think of Tyler’s representation?

## Problem 9 (Exploration)

How many connecting cubes could there be in the image?