Tuesday
Tuesday: One tenth as much
Rosie the Rabbit holds a long green ribbon, exactly one meter long.
"I want to share this ribbon with nine friends," she says.
Bennie folds the ribbon into ten equal parts and opens it again.
"Each part is one tenth of a meter," he says. "We write that as 0.1."
Rosie looks at one small part. "What if I fold this part into ten again?"
"Then each tiny piece is one tenth of one tenth," says Bennie.
"That is one hundredth of the whole ribbon, or 0.01."
Rosie wiggles her nose. "Places keep going to the right!"
Learn it: one place to the right is one tenth as much
A digit is worth one tenth as much when it moves one place to the right.
The 7 in 700 is worth 700. The 7 in 70 is worth 70.
70 is one tenth of 700, because 700 ÷ 10 = 70.
The places keep going past the ones place.
7 ÷ 10 = 0.7, which is seven tenths.
0.7 ÷ 10 = 0.07, which is seven hundredths.
0.07 ÷ 10 = 0.007, which is seven thousandths.
The shaded part is 7 tenths of the bar, or 0.7.
- Read the question.
- Tap your answer.
- Read the question.
- Tap your answer.
- Read the question.
- Tap your answer.
- Read the question.
- Tap your answer.
| Sentence | True or false? |
|---|---|
| 0.3 = 3 ÷ 10 | ? |
| 0.05 = 0.5 ÷ 10 | ? |
| 0.2 = 20 ÷ 10 | ? |
| A digit moved one place right is worth one tenth as much. | ? |
- Each number is ten times the one before.
- Put them from least to greatest.
Color 3 parts. You colored 0.3 of the strip.
Now look at one part. Imagine folding it into ten tiny parts.
One tiny part is 0.01 of the whole strip.
Wonderful! Tomorrow we multiply by 10, 100 and 1,000 and find patterns.