Transcript Direction and Angle Positions and directions Objectives • Add and subtract a pair of two-digit numbers • Recognise positions and directions • Use the eight.

Direction and Angle
Positions and directions
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.
Answer these questions on your
whiteboards.
• What is:
7+4?
Answer these questions on your
whiteboards.
• What is:
17 + 4 ?
Answer these questions on your
whiteboards.
• What is:
27 + 4 ?
Answer these questions on your
whiteboards.
• What is:
27 + 14 ?
Answer these questions on your
whiteboards.
• What is:
37 + 24 ?
Answer these questions on your
whiteboards.
• What is:
15 - 7 ?
Answer these questions on your
whiteboards.
• What is:
25 - 7 ?
Answer these questions on your
whiteboards.
• What is:
65 - 7 ?
Answer these questions on your
whiteboards.
• What is:
65 - 17 ?
Answer these questions on your
whiteboards.
• What is:
75 - 27 ?
Answer these questions on your
whiteboards.
• What is:
48 + 26 ?
How did you work this one out?
Lets look at some different
strategies that you used.
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?
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?
Remember that a clockwise turn is
to the right like the hands of a
clock.
• Stand facing north again.
• Make a quarter turn to face south.
• Did you turn clockwise or anticlockwise?
Remember that a quarter turn is a
right-angled turn.
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?
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
Turn two anti-clockwise through
two-right angles.
• In which direction are you facing now?
Who thinks that they could label this
compass?
Copy and complete the compass in
your books.
NW
N
W
NE
E
SW
SE
S