Monday
Monday: Ten times as much
Bennie the Bear sets four baskets in a row on the warm grass.
Each basket holds one smooth stone with a 3 painted on it.
"Welcome to Grade 5 math," says Bennie. "This summer we start with place value."
Rosie the Rabbit hops over and peeks into every basket.
"Every stone says 3," she says. "So every stone is worth the same, right?"
Bennie lines the baskets up to make the number 3,333.
"They look the same," he says, "but each 3 is worth ten times the 3 to its right."
Rosie's ears stand up tall. "Show me how!"
Learn it: each place is ten times the place to its right
Here is 3,333 in a place value chart.
The 3 in the ones place is worth 3.
The 3 in the tens place is worth 30.
The 3 in the hundreds place is worth 300.
The 3 in the thousands place is worth 3,000.
Each move one place to the left makes the value 10 times as much.
Why ten? Ten groups of 3 make 30, so 10 × 3 = 30.
In the same way, 10 × 30 = 300 and 10 × 300 = 3,000.
- Read the question.
- Tap your answer.
- Read the question.
- Tap your answer.
- Read the question.
- Tap your answer.
| Sentence | True or false? |
|---|---|
| 3,000 = 10 × 300 | ? |
| 500 = 10 × 5 | ? |
| 80 = 10 × 8 | ? |
| In 5,555, every 5 is worth the same. | ? |
- Find what each 6 is worth.
- Put them from least to greatest.
Write a 4 on a small scrap of paper and set it in the ones place.
Say its value. Then slide it one place to the left.
Say the new value. What happens each time you slide it?
Great thinking! Tomorrow we slide the other way and meet one tenth.