Week 10 · Measure length
Wednesday
Estimate and compare
// Inches, feet, centimeters and meters
⏱ about 15 min
Wednesday: Estimate and compare
Lizzy and Bennie look at two sticks on the trail.
"I think this stick is about 9 inches long," says Lizzy.
"That is an estimate, a careful guess," says Bennie.
Lizzy measures to check. "It is 10 inches! I was close."
"Now, how much longer is it than the other stick?"
Learn it: estimate, then check
To estimate, think of a length you know.
A paper clip is about 1 inch long.
Then measure to check your guess.
Close is great! An estimate does not need to be exact.
WHAT IS A GOOD ESTIMATE?
- Read the question.
- Tap your answer.
A new pencil is about how long?A door is about how tall?
A spoon is about how long?
A bed is about how long?How much longer?
The red stick is 10 inches. The brown stick is 6 inches.
To compare, subtract. 10 take away 6 is 4.
The red stick is 4 inches longer.
HOW MUCH LONGER?
- Read the question.
- Tap your answer.
A blue bar is 9 cm. A red bar is 5 cm. How much longer is the blue bar?
A twig is 12 inches. A leaf is 7 inches. How much longer is the twig?
A rope is 35 feet. A hose is 20 feet. How much longer is the rope?
Lizzy's path is 80 meters. Bennie's is 45 meters. How much longer is Lizzy's?
Think about how Bennie compared the sticks.
| Sentence | True or false? |
|---|---|
| An estimate is a careful guess. | ? |
| We measure to check an estimate. | ? |
| To find how much longer, we add. | ? |
WHY THIS EXERCISETo find how much longer, we subtract the shorter length.
ORDER THE RIBBONS, SHORTEST FIRST
- Find the shortest ribbon first.
- Tap the lengths from shortest to longest.
11st
22nd
33rd
44th
Try it
Pick 3 things in your home.
Estimate how many inches long each one is.
Measure each one with a ruler.
Were you close?
Estimate how many inches long each one is.
Measure each one with a ruler.
Were you close?
Word Spot: miss, idea, enough
Here are new sight words.
Look at each word. Say it. Spell it.
Miss: M-I-S-S.
Idea: I-D-E-A.
Enough: E-N-O-U-G-H.
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.
I ___ my friend.
That is a good ___.
Do we have ___ chairs?
Good guessing! Tomorrow Chris tells a story about a long trail.