H:\Nick's Folder\Basic Facts\Worksheet for addition basic facts.doc
Sixty Seconds a Day for Eight Days
Add your score to your graph each day.
60 Seconds a Day for Eight Days
Record your results on a graph
Learning the addition and subtraction facts…
Remember to ensure that before the children start learning each set of facts you check that the children understand the meaning[s] of addition and subtraction…
Subtraction can either involve a “take-away” or finding the difference…
e.g. for 13 – 6 = 7
”Take-away” … “Peter had thirteen lollies and he ate six of them and then there were only seven left”
Difference … “Ngaire has saved thirteen dollars towards the trip and Matt has saved six dollars… How much more does Matt have to save to have the same amount as Ngaire?
Also the children need to explore the idea that addition is commutative but subtraction isn’t… e.g. 3 + 4 = 7 and 4 + 3 = 7, BUT the same doesn’t work for 7 – 3…
7 – 3 = 4, but for 3 – 7 the answer would be negative 4!
A suggested order for learning the facts is:
Stage 2: Learn the + and – facts to 5
Stage 3: Learn the facts for ten
Stage 4: Learn the doubles [to 9 + 9] and teen facts [e.g. 7 + 6]
Stage 5: Know all of the addition facts to 9 + 9 and the multiplication facts for 2, 5
and 10
Stage 6: Know all of the subtraction and multiplication facts [to 9 x 9]
Stage 7: Know all of the division facts.
Stage 8: Know factors and common multiples of numbers… e.g. the factors of 24 are
1, 2, 3, 4, 6, 8, 12, 24 and the factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36…
The highest common factor of 24 and 36 is 12.
The multiples of 3 are 0, 3, 6, 9, 12, 15, 18, 21, 24 … of 5 are 0, 5, 10, 15, 20,
25 … Common multiples of 3 and 5 are 0, 15 … The least common multiples is
15