2. Objectives
• Add and subtract a pair of two-digit
numbers
• Recognise positions and directions
• Use the eight compass directions N, S, E,
W, NE, NW, SE,SW.
• Make and measure clockwise and
anticlockwise turns.
13. Answer these questions on your
whiteboards.
• What is:
48 + 26 ?48 + 26 ?
How did you work this one out?
Lets look at some different
strategies that you used.
14. Now try these on your whiteboards,
you have 2 minutes to work them
out.
23 + 45 = 45 – 26 =
56 + 32 = 87 – 63 =
69 + 28 = 58 – 39 =
71 + 26 = 66 – 52 =
Did any of these cause
difficulty?
15. Lets label the walls of the class N,
S, E and W.
• Stand facing north
• Turn to face east, south and then west.
• Did you turn clockwise or anticlockwise?
RememberRemember that a clockwise turn isthat a clockwise turn is
to the right like the hands of ato the right like the hands of a
clock.clock.
16. • Stand facing north again.
• Make a quarter turn to face south.
• Did you turn clockwise or anticlockwise?
RememberRemember that a quarter turn is athat a quarter turn is a
right-angled turn.right-angled turn.
17. Stand facing north again.
Make a half turn clockwise.
Which direction are you facing?
Turn to face west. What sort of turn did you make?
Face north and turn clockwise through half a right
angle.
Does anyone know which direction you are facing
now?
18. Halfway between north and east is
called north-east.
• What is half-way between north and west?
• North-west
• What is halfway between east and south?
• South-east
• What is halfway between south and west?
• South-west
