Subtraction facts to 20 - NZ Maths
Subtraction facts to 20
Why do this?
To help your child to learn subtraction facts to 20
What you need:
A set of number cards 1 – 10.
A set of number cards 11 – 20.
What to do:
Make the two sets of number cards. You can print the ones on the next page or make your own.
Make a pile for each set of cards. Face them down.
Ask your child to turn over the top card from the 11-20 pile. For example: 14
Turn over the top card from the 1 – 10 pile. For example: 5
Ask your child to subtract that number from the first number. 14 – 5 = 9
The aim is to work it out quickly – to practice instant recall.
If your child answers quickly and correctly give them the 1 – 10 card. If not put it back into the pile.
The activity finishes when your child has collected all of the 1 -10 cards.
What to expect your child to do:
• To instantly recall the addition facts up to 20.
Variations:
Two players can play to see who can give the answer first.
Use a timer. If a player does not give the correct answer quickly, the other player can answer.
Choose the same number between 11 and 20 to focus on.
Number cards for Subtraction facts to 20
| | | | | |
|1 |2 |3 |4 |5 |
| | | | | |
|6 |7 |8 |9 |10 |
Number cards for Subtraction facts to 20
| | | | | |
|11 |12 |13 |14 |15 |
| | | | | |
|16 |17 |18 |19 |20 |
-----------------------
Cards 1 – 10
Cards 11 – 20
14
5
................
................
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