# Lesson 20 Make Two-Digit Numbers in Different Ways

Let’s make two-digit numbers in different ways.

## Warm-up Estimation Exploration: Tens and Ones

How many do you see?

Record an estimate that is:

too low

about right

too high

Record an estimate that is:

too low

about right

too high

## Activity 1 All The Ways to Make 94

How many ways can you make 94 using tens and ones?

Show your thinking using drawings, numbers, or words.

## Activity 2 Mystery Bags

Bag A has 2 ones and 5 tens.

How many cubes are in Bag A?

Show your thinking using drawings, numbers, or words.Bag B has 4 tens and 25 ones.

How many cubes are in Bag B?

Show your thinking using drawings, numbers, or words.Bag C has 49 cubes.

If there are 29 ones, how many tens are in the bag?

Show your thinking using drawings, numbers, or words.Bag D has 36 cubes.

If there are only 2 tens, how many ones are in the bag?

Show your thinking using drawings, numbers, or words.If you have time… Write a mystery bag problem about tens and ones.

Switch with your partner.

Solve.

## Practice Problem

## Problem 1

Show 4 different ways you can make 35 using tens and ones.