Module 3

Lesson 5

Problem Solving

• Freddy has $250 in ten dollar bills. How many ten dollar bills does Freddy have?

Problem Solving• Freddy has $250 in ten dollar bills. He gave 6

ten dollar bills away to his brother. How many ten dollar bills does he have left?

100 200 210 220 230 240 250

Can we take away 6 ten dollar bills?

Wait, we don’t have enough tens. Where can we get more tens to take away?

10 20 30 40 50 60 70 80 90 100

Now, can we take away the last ten dollar bill?

How many hundreds and tens does Freddy have now? Does that answer our problem?

Problem Solving• Freddy has $250 in ten dollar bills. He gave 6 ten

dollar bills away to his brother. How many ten dollar bills does he have left?

How many tens does Freddy have now?

Place ValueHundreds Tens Ones

Count with me 1 one, 2 ones, 3 ones, 4 ones. 1 ten, 2 tens, 3 tens. 1 hundred, 2 hundred.

Place ValueHundreds Tens Ones

Can I make larger units?

Place ValueHundreds Tens Ones

In order from greatest to smallest, how many of each units are there?

2 hundreds 3 tens 4 ones

Place ValueHundreds Tens Ones

What number does that represent?

2 hundreds 3 tens 4 ones2 3 4

Place ValueHundreds Tens Ones

What if I had 3 tens, 4 ones and 2 hundreds?

2 hundreds 3 tens 4 ones2 3 4

234 is called unit form

Let’s show 563 in Base ten formHundreds Tens Ones

What is the amount of each?

500 60 3

This is called the expanded formNow show me the unit form

5 6 3

Now try 627 without a place value chart. Show the number in expanded form

627

600 20 7

Show the number in base ten form

627

600 20 76 hundreds 2 tens 7 ones