2. Objectives
โข Add and subtract a pair of two-digit
numbers
โข Recognise positions and directions
โข Use the eight compass directions N, S, E,
W, NE, NW, SE,SW.
โข Make and measure clockwise and
anticlockwise turns.
13. Answer these questions on your
whiteboards.
โข 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 โ 26 =
56 + 32 = 87 โ 63 =
69 + 28 = 58 โ 39 =
71 + 26 = 66 โ 52 =
Did any of these cause
difficulty?
15. Lets label the walls of the class N,
S, E and W.
โข Stand facing north
โข Turn to face east, south and then west.
โข 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. โข Stand facing north again.
โข Make a quarter turn to face south.
โข 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.
โข What is half-way between north and west?
โข North-west
โข What is halfway between east and south?
โข South-east
โข What is halfway between south and west?
โข South-west
19. Turn two anti-clockwise through
two-right angles.
โข In which direction are you facing now?
