Year 4 KO Reference d
Know by heart all addition and subtraction facts for each number to 20.
4. What is 9 + 6 ?
16. What is 17 - 8 ?
Key Words
Minus, subtract, take away, add, addition, plus, equals, makes, is the same as, leaves, difference, total, altogether, number bonds to 20.
Key Questions
What helps you to remember which numbers add to 15, 20 etc?
In how many ways can you make 16, 12 etc?
Does it make a difference which number you start with when you add numbers?
Does it make a difference which number you start with when you subtract?
Practical Activities
Use of the whiteboard/100 square/number lines/purse and money to practice the above.
Use of dominoes: pupils add the two sides of a domino. What is the smallest total? What is the biggest total? This can be made into a game, with the pupils keeping a running total of their scores – the winner has the highest total.
Playing cards can also be used – pupils take it in turns to turn over and add the totals of two cards. Again, this can be made into a game. This can be used for addition/subtraction.
Straws can be used: different ways of making 20.
Rolling/adding the totals of 2 or 3 dice together.
Using 100 squares/number lines to assist with addition/subtraction.
Include addition/subtraction with money – again, practical activities are useful.
Role play – addition/subtraction in the shop/supermarket etc. Shopping lists can be devised and bills can be calculated (simple addition/subtraction).
Addition/subtraction/counting in the school grounds.
Talking partners/group activity finding all possible additions & subtractions which make 18, 16 etc.
Written Activities
Worksheets to link with Dominoes/Dice/Card Games as above.
Worksheets to practice addition/subtraction to at least 20.
Worksheets with pictures to assist pupils who find this concept difficult. The pupils can then count the objects to add/take away.
Worksheets with word problems to link with Role Play.
Addition with 3 numbers should also be covered.
Games
See above – use of cards, dominoes and dice.
IT
:Maths Packs, Primary Games & Teaching Money
… select “Missing numbers”
NNS ITP : ‘Difference’ and ‘Number facts’
Home activities/Homework
Activities to develop skills in addition/subtraction. A Maths Sack could be put together with suitable resources in – whiteboard, number line, dominoes, cards, dice etc for the pupils to take home. Suggested activities could also be included.
Springboard 4
Unit 2
Pages 32 - 40
4KOd