Week 11 · Add and subtract tens
Thursday
Take away tens
// Bigger numbers, tens and ones
⏱ about 15 min
Thursday: Take away tens
Chris the Coyote sits by the trail with his satchel.
"Hazel had many paper stars," he says.
"Listen to what happened to them."
Story: Hazel shares her stars
Hazel made 70 paper stars, in bags of ten.
She gave 3 bags to her friends at the pond.
Bennie helped her count what was left.
"7 tens take away 3 tens is 4 tens."
"You still have 40 stars, Hazel!"
Learn it: take away tens
Think of a small fact first.
7 take away 3 is 4.
So 7 tens take away 3 tens is 4 tens.
70 take away 30 is 40.
ABOUT THE STORY
- Read the question.
- Tap your answer.
How many stars did Hazel make?Hazel had 70 stars. She gave away 30. How many are left?
TAKE AWAY TENS
- Read the question.
- Tap your answer.
50 - 20 = ?90 - 40 = ?
60 - 10 = ?
80 - 80 = ?
COUNT BACK BY TENS
- Start with 90.
- Take away one ten each time.
11st
22nd
33rd
44th
55th
Use a small fact, like 6 take away 2.
| Number sentence | True or false? |
|---|---|
| 70 - 30 = 40 | ? |
| 60 - 20 = 30 | ? |
| 40 - 10 = 30 | ? |
WHY THIS EXERCISE6 tens take away 2 tens is 4 tens. That is 40.
Try it
Make 5 piles of 10 small things.
Take away 2 piles.
Count the piles left by tens.
You found 50 take away 20 is 30!
Take away 2 piles.
Count the piles left by tens.
You found 50 take away 20 is 30!
Draw Hazel's bags of stars that are left.
Word Spot: answer, study
Here are new sight words.
Look at each word. Say it. Spell it.
Answer: A-N-S-W-E-R.
Study: S-T-U-D-Y.
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.
Do you know the ___?
Scientists ___ the stars.
What a kind story! Tomorrow Freddy has a game.