Welcome to our Upper KS2 meeting 0n Progression in Calculations
Jan 01, 2016
Welcome to our Upper KS2meeting 0n
Progression in Calculations
Understanding and Using Calculations
For all calculations, children need to:
Decide on the most appropriate method i.e. mental, mental with jottings, written method or calculator
Approximate before calculating and check whether their answer is reasonable.
Facts need to be learnt off by heart
Tables – Vital for multiplication, division,
fractions, percentages, measures and problem
solving. Doubles - both whole and decimal
numbers. Halves – both whole and decimal
numbers. Need to practise counting up and
down in different amounts.
Grid Method
7
10 6
70 42
7042
112+
16 x 7 =
Grid Method
600100 90 15805
+
x 20 3
30 600 90
5 100 15
Children have to develop their understanding of related facts.
23 x 35=
Show Video 1
12 2.7+ 0.06 14.76
Once children are confident at grid method they will move on to column multiplication.
Have a go at solving this multiplication using the grid method.
54.3 x 4
10x
-4-4-4-4-4-4-4-4
-4
-4-4-42x
48 ÷ 4 = 12
Division by Chunking
Recall of multiplication tables helps make this method more efficient, e.g. 72 ÷ 3.
Division by Chunking
e.g. 196 ÷ 6
Watch Video of HTU ÷ TU
1 x 7 = 72 x 7 = 145 x 7 = 3510 x 7 = 70
Have a go at solving this division using the chunking method.
96.8 ÷8
Watch Video to find the answer
Applying what you know
73 children and 8 adults are going on a school trip. How many buses do they need to hire if buses have 25 seats (not including the driver’s seat!)
I have saved £230. A train ticket costs £50. How many tickets can I buy.