Week 01 · Facts to 20
Wednesday
Think addition to subtract
// Make a ten, use doubles, think addition
⏱ about 15 min
Wednesday: Think addition to subtract
Bennie has 14 apples in his basket.
He gives 6 apples to Donnie the Deer.
"How many do you have left?" asks Donnie.
Bennie thinks for a moment.
"I know that 6 + 8 = 14. So I have 8 left!"
Learn it: take back to ten
Bennie starts at 14 and takes away 6.
First he takes away 4. That gets him to 10.
Then he takes away 2 more. He lands on 8.
So 14 - 6 = 8. The difference is 8.
SUBTRACT BACK TO TEN
- Read the question.
- Tap your answer.
14 - 6 = ?
13 - 5 = ?15 - 7 = ?
12 - 4 = ?
Learn it: think addition
To find 15 - 7, ask: 7 plus what makes 15?
Bennie knows 7 + 8 = 15. So 15 - 7 = 8.
THINK ADDITION
- Read the question.
- Tap your answer.
7 + ? = 15
9 + ? = 13
8 + ? = 16
5 + ? = 11
TAKE 5 AWAY FROM 13
- Go back to ten first.
- Tap the steps in order.
1First
2Next
3Last
Think of the addition fact that matches.
| Number sentence | True or false? |
|---|---|
| 12 - 5 = 7 | ? |
| 16 - 9 = 6 | ? |
| 18 - 9 = 9 | ? |
| 11 - 3 = 9 | ? |
WHY THIS EXERCISE16 - 9 is 7, and 11 - 3 is 8.
STORY PROBLEMS
- Read the question.
- Tap your answer.
Bennie has 15 apples. He gives 7 to Donnie. How many are left?
12 ducks swim on the pond. 8 fly away. How many are still swimming?
Rosie has 17 berries. She shares 9 with Bennie. How many does she keep?
Try it
Put 13 spoons on the table.
Take away 3 spoons. How many are left?
Take away 2 more. Now how many are left?
Take away 3 spoons. How many are left?
Take away 2 more. Now how many are left?
Word Spot: near, add
Here are new sight words.
Look at each word. Say it. Spell it.
Near: N-E-A-R.
Add: A-D-D.
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.
Stay ___ your grown-up.
If you ___ two and two, you get four.
Well done! Tomorrow Chris tells a story about fact families.