Week 08 · Subtract within 100
Thursday
The firefly meadow
// Take away tens and ones
⏱ about 15 min
Thursday: The firefly meadow
Chris the Coyote settles by the fire with his satchel.
"One summer night, Donnie counted fireflies in the meadow," he says.
"There were 64 of them, glowing softly."
"Then a breeze came, and 28 fireflies floated away."
"Donnie wondered how many fireflies stayed to glow with him."
Story: Fireflies in the meadow
There were 64 fireflies.
28 floated away.
There are not enough ones, so break a ten.
5 tens and 14 ones. Now 14 - 8 = 6.
5 tens - 2 tens = 3 tens.
So 36 fireflies stayed.
QUESTIONS ABOUT THE STORY
- Read the question.
- Tap your answer.
How many fireflies were there at first?
There were 64 fireflies. 28 flew away. How many stayed?
How can Donnie check his answer?
More story problems
SOLVE THE STORY
- Read the question.
- Tap your answer.
Donnie sees 45 ducks. 23 swim away. How many are left?
Bennie has 80 apples. He shares 35. How many are left?
Riley has 72 puzzle pieces. He uses 49. How many are left?
Then 28 fireflies came back to the 36. How many now?
ADD OR SUBTRACT?
- Read the question.
- Tap your answer.
Donnie has 50 leaves. The wind blows 20 away.
Donnie has 50 leaves. He finds 20 more.
Break a ten when you need more ones.
| Sentence | True or false? |
|---|---|
| 64 - 28 = 36 | ? |
| 80 - 35 = 45 | ? |
| 72 - 49 = 33 | ? |
WHY THIS EXERCISE72 - 49 is 23, not 33.
Try it
Count 20 small toys.
Hide some behind your back.
Ask a grown-up how many you hid.
Hide some behind your back.
Ask a grown-up how many you hid.
Draw the fireflies that stayed with Donnie.
Word Spot: sea, began, grow
Here are new sight words.
Look at each word. Say it. Spell it.
Sea: S-E-A.
Began: B-E-G-A-N.
Grow: G-R-O-W.
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.
The ___ water is salty.
The show ___ at noon.
Puppies ___ fast.
What a glow! Tomorrow Freddy has a game.