Transcript Understand division as sharing

16th November 2011
• To understand how your child learns numeracy
in school (focusing on the 4 calculations)
• To understand how you can help your child
with numeracy at home.
• Number
• Shape, space and measure
• Handling data
• Problem solving
Mental Warm Up : 10 minutes E.g.: Bingo, game,
counting stick, interactive activity
Main Teaching : 20 minutes
Activities and challenge : 20 – 25 minutes
Plenary : 5-10 minutes
• Lies
at the heart of numeracy
• Mental
method is emphasised
- Remembering number facts
- Using them to work out new facts
- Understanding the relationship
between ‘the 4 rules’
- Repertoire of mental strategies.
• Written
methods follow on
• Application
to real life e.g.: problem solving
100 square
Multiplication
Number lines
Square
Multi Link Blocks
Base ten - HTU
Whiteboard & Pen
Know and use number bonds to 10 and 20
2 + 8 = 10
20 + 80 = 100
200 + 800 = 1000
22 + 8 = 30
Use a number line to count, putting the
biggest number first
Add 2 numbers that bridge 10
Add to the next 10 and
then add the extra
Adding 2 2-digit numbers (without bridging)
15 + 13 =
+ 10
+3
Add two 2 digit numbers (informal method)
48 + 36 =
Use a number line…
Partition into tens and
units
Expanded Written
Method
Standard Written
Method
48 + 36 =
48 + 36 =
U
TU
40 + 8
48
30 + 6
+36
T
80 + 4
10
84
1
Know by heart subtraction facts for numbers up to
10 and 20
20 = 12 + 8
20 – 8 = 12
20 – 12 = 8
Subtract single digit numbers, bridging through
the 10
Begin to find the difference by counting up from
the smallest number
43 – 27 =
The Expanded Method
T
30
U
10+
40 + 3
- 20 + 7
10 + 6
The Standard Written
Method
Understand multiplication as repeated addition
Understand multiplication as an array
Multiply multiples
of 10 by units
Use place value to support the
multiplication of TU and U
alongside the grid method
Understand division as sharing
15  5 = 3
15 SHARED between 5
Understand division as sharing
Use known multiplication facts to work out division
facts
Reinforce division as grouping through
the use of arrays and as repeated
subtraction
Divide with remainders
15  4 =
15  4 = 3 r 3
Division by chunking
87  7 = 12 r 3
87
- 70 (10x7)
17
- 14 (2 x 7)
3
• Practical experience
• Everyday / real world examples
• Grasping the vocabulary
• Making links e.g.: between units
• Counting in 5s
• Understanding quarters and halves
• ‘0 clock, half past, quarter past,
quarter 2.
• 5 minute intervals
• 1 minute intervals
• Constant links between analogue and
digital.
•Reading timetables
•Practice!!!
•
Computer based tutoring program
•
Personalised Maths support
•
Tailored to individual needs
•
Gives teacher’s insights into problem areas
•
Consolidate skills and build confidence
•
Interactive and fun!