Week 10 · Measure length
Tuesday
Centimeters and meters
// Inches, feet, centimeters and meters
⏱ about 15 min
Tuesday: Centimeters and meters
Lizzy holds up a new ruler with lots of little marks.
"These marks are centimeters," she says.
"A centimeter is shorter than an inch."
Bennie measures his notebook two ways.
"It is about 8 inches long," he says.
"And it is about 20 centimeters long! Why is that number bigger?"
Learn it: small units, big numbers
Each space on this ruler is 1 centimeter.
This bar is 7 centimeters long.
Centimeters are small, so we need more of them.
That is why the centimeter number is bigger.
For long things, we use meters. 100 centimeters make 1 meter.
HOW MANY CENTIMETERS?
- Read the question.
- Tap your answer.
How many centimeters long is the bar?
How many centimeters long is the bar?
How many centimeters long is the bar?
How many centimeters long is the bar?Think about Bennie and his notebook.
| Sentence | True or false? |
|---|---|
| A centimeter is shorter than an inch. | ? |
| 100 centimeters make 1 meter. | ? |
| Small units give a smaller number. | ? |
WHY THIS EXERCISESmall units give a bigger number, because we need more of them.
WHICH UNIT IS BETTER?
- Read the question.
- Tap your answer.
Lizzy measures a leaf. Centimeters or meters?
Bennie measures a long path. Centimeters or meters?How many centimeters make 1 meter?
MEASURE TWO WAYS
- Read the question.
- Tap your answer.
A rope is 3 feet long. Is it more or fewer than 3 inches?A ribbon is 5 inches or about 13 centimeters. Which number is bigger?
25 ? 52
SMALL TO BIG UNITS
- Start with the smallest unit.
- Tap the units from smallest to biggest.
11st
22nd
33rd
44th
Try it
Find a ruler with centimeters.
Measure your hand from wrist to fingertip.
Then measure it in inches too.
Which number is bigger? Why?
Measure your hand from wrist to fingertip.
Then measure it in inches too.
Which number is bigger? Why?
Word Spot: wash, which, later
Here are new sight words.
Look at each word. Say it. Spell it.
Wash: W-A-S-H.
Which: W-H-I-C-H.
Later: L-A-T-E-R.
FIND THE WORD
- Listen to the word.
- Tap it.
Find the word you hear.
Find the word you hear.
Find the word you hear.
Find the word you hear.
FILL THE GAP
- Listen to the sentence.
- Tap the missing word.
We ___ the dishes after dinner.
___ one is the tallest?
See you ___!
Great work! Tomorrow we estimate and compare lengths.