direction and angle

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 ?7 + 4 ?

Answer these questions on your whiteboards.

• What is:

17 + 4 ?17 + 4 ?

Answer these questions on your whiteboards.

• What is:

27 + 4 ?27 + 4 ?

Answer these questions on your whiteboards.

• What is:

27 + 14 ?27 + 14 ?

Answer these questions on your whiteboards.

• What is:

37 + 24 ?37 + 24 ?

Answer these questions on your whiteboards.

• What is:

15 - 7 ?15 - 7 ?

Answer these questions on your whiteboards.

• What is:

25 - 7 ?25 - 7 ?

Answer these questions on your whiteboards.

• What is:

65 - 7 ?65 - 7 ?

Answer these questions on your whiteboards.

• What is:

65 - 17 ?65 - 17 ?

Answer these questions on your whiteboards.

• What is:

75 - 27 ?75 - 27 ?

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.

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?

RememberRemember that a clockwise turn is that a clockwise turn is to the right like the hands of a to the right like the hands of a

clock.clock.

• Stand facing north again.

• Make a quarter turn to face south.

• Did you turn clockwise or anticlockwise?

RememberRemember that a quarter turn is a that a quarter turn is a right-angled turn.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?

NN

EE

SS

WW

NENE

SESESWSW

NWNW

Who thinks that they could label this compass?

Copy and complete the compass in your books.