Transcript How to Help Your Child with Maths

How to Help Your Child with
Maths
INSPIRE 6AV
This morning?
“They do it all differently these days!”
Bridging the gap
They are teaching you this morning!
What is important?
• A strong foundation in the basics
– Just like the foundations of a house, if the
basics aren’t solid then cracks will appear
– So, keep returning to the fundamentals
– Your child should not just be familiar with
the basics, but fluent
– Don’t be afraid to do the old drills and
skills
Anything else important?
• Multiplication tables
• Rapid and accurate addition and subtraction
• Telling the time, analogue and digital
• Drip, drip, drip….
Anything else important?
• A sound understanding of place value is
very important
Not millions Th H T U . 1/10 1/100
So what are the basics?
•
•
•
•
•
Addition
Subtraction
Multiplication
Division
Problem solving
Some practical ideas…
Times tables in the car…drill and quickfire
Real life, Do I have enough money?
What change should I get?
Which is the best value?
What time will it be in 25 minutes?
Cooking, weighing, measuring.
Do I have enough rice to make this dish?
What methods do we use?
• Mental first!
• To equip children for real life, their mental maths
skills are the most important.
• Speeding up the accuracy and fluency of mental
methods will help with written methods later.
What methods do we use?
• Mental strategies ( a small selection)
• Bonds to 10 and 100
• Partitioning.
24 + 43 =
20 + 40 = 60
4+ 3= 7
60 + 7 = 67
What methods do we use?
Your turn….
• Play I say, you say with your bonds to 10, then 100.
then….
• Solve this calculation by partitioning…
• 54 + 32 =
• If you finish early, you can practise by using the
number cards on your desks, turn over 2.
What methods do we use?
• But they will soon use more written methods
in their Mathematics
– Using a variety of methods
– Building towards a standard method
– They often follow the path from an
expanded method
to a shorter method
and finally a compact method
Addition in Key Stage 2
• The Compact Method
75
+23
98
Addition in Key Stage 2
• Carrying
• The Compact Method
78
+23
101
Notice the carry written
under the line
Addition in Key Stage 2
Your turn….
Solve this calculation
65
+ 78
Addition in Key Stage 2
• Decimals
“Decimals Don’t Dance!”
• The decimal point stays in the same place
71.3
2.25

71.3
2.25 
Decimals should not be written in the square
of a book as they have no place value. They
should be written on a line 1 2.4
Addition in Key Stage 2
Your turn….
Line up the decimals to solve this
calculation using the compact method
43.2 + 12.25 =
Preparing for Multiplication
• Children must know their tables - fluently
• ? X 5 = 15
• 3 x ? = 15
• 3x5=?
• Mad Minutes….your turn!
Preparing for Multiplication
• Place value
Th
H
T U 1/10 1/100
• Multiplying by 10
Move each digit one place to
L
the left (remember Multip ication)
H T U That leaves
1 7 a space in
1 7
to which we
put a zero to hold the place
Preparing for Multiplication
• Common Errors
– Why don’t we say ‘add a zero’ when
multiplying by 10?
• 1.7 x 10 = 1.70 we have added a zero but
have not made any difference to the number
– Why do we need a zero at all?
• This is 170 without a zero
H T U
which looks like
1 7
17
Multiplication in KS2
• Grid Method
19 x 6
10
6 60
9
54
60
+ 54
114
Multiplication in KS2
• Grid Method
29 x 6
20
6 120
9
54
120
+54
174
Knowing 2 x 6 = 12 is a basic fact
So
20 x 6 = 120 can be ‘grown’ from this
basic fact
Multiplication in KS2
• Grid Method
27 x 23
20
400
140
20
7
2x2=4
20x2=40
20 x20 = 400
3
60
21
400
140
+ 60
21
621
Multiplication in KS2
Grid method
Your turn….
22 x 14 =
Multiplication in KS2
• Shorter Vertical Method
19
x 6
60
54
114
write this first
(10 x 6)
(9 x 6)
Division in KS2
• Tables! Tables! Tables!
• How to rally robin
Your turn: try it with 2, 5 and 10 x tables.
Division in KS2
• Tables! Tables! Tables!
• Chunking Method
43 ÷ 7
is written as
7 43
Division in KS2
7 43
-14
29
-14
2 X7
Keep it simple
2 X7
Use 1,2,5,10 times tables
for multiples of 7
and so on
Division in KS2
13 r 2
7 93
-70
23
-14
9
-7
2
10 X 7
Can we get 10 x 7s, 5 x 7s? No
2 X7
1 X 7
Division in KS2
Chunking method
Your turn
5
78
Remember we are taking away, lots of 5….
Stand up bingo
Write any 5 of the following numbers on your
boards.
0, 2, 4, 5, 6, 8, 10, 12, 14, 15,
20, 22, 24, 26, 28, 30
Thank you for coming!
• This presentation is available on our
classblog… as is a more comprehensive
version.
• Please come to see us with any questions