# 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?

1. Record an estimate that is:

too low

too high

2. Record an estimate that is:

too low

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

1. Bag A has 2 ones and 5 tens.
How many cubes are in Bag A?
Show your thinking using drawings, numbers, or words.

2. Bag B has 4 tens and 25 ones.
How many cubes are in Bag B?
Show your thinking using drawings, numbers, or words.

3. 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.

4. 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.

5. If you have time… Write a mystery bag problem about tens and ones.