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Starter LO: I can demonstrate a written method for addition.
Please work through these calculations using the formal
column addition method.
452 + 123 =
231 + 134 =
569 + 115 =
678 + 144 =
5124 + 154 =
6547 + 178 =
2145 + 1240 =
5577 + 3434 =
8577 + 3434 =
9519 + 1247 =
8512 + 5641 =
16421 + 8451 =
98541 + 24579 =
CHALLENGE = Use the inverse to check your answers.
Starter Answers
452 + 123 = 575
231 + 134 = 365
569 + 115 = 684
678 + 144 = 822
5124 + 154 = 5,278
6547 + 178 = 6,725
2145 + 1240 = 3,385
5577 + 3434 = 9,011
8577 + 3434 = 12,011
9519 + 1247 = 10,766
8512 + 5641 = 14,153
16421 + 8451 = 24,872
98541 + 24579 = 123,120
LO: to calculate missing angles around a
point
In order to answers these types of calculation, we will have to
practise two key skills.
Key skill 1:to learn the
number of degrees around
a point
Key skill 2 - to find a
missing angle around a
point
RE-CAP
How many degrees are in a
full rotation?360.
How do we know?9090
9090
RE-CAP
How many degrees are in a
full rotation?360.
How do we know?9090
9090
As you can see, there
are 4 right angles at
the centre point of the
circle.
Watch Me
Key skill 1:to learn the number of degrees
around a point
There are ____ degrees in one right
angle (a quarter turn).
There are ____ degrees in two right
angles (half a turn).
?
?
Think about our learning from yesterday.
Straight line
Watch Me
Key skill 1:to learn the number of degrees
around a point
There are ____ degrees in one right
angle (a quarter turn).
There are ____ degrees in two right
angles (half a turn).
Think about our learning from yesterday.
90
180
Watch Me
Key skill 1:to learn the number of degrees
around a point
There are ____ degrees in three right
angles (a three quarter turn).
There are ____ degrees in a four
right angles (a complete turn).
?
?
Watch Me
Key skill 1:to learn the number of degrees
around a point
There are ____ degrees in three right
angles (a three quarter turn).
90 x 3 = 270
There are ____ degrees in a four
right angles (a complete turn).
90 x 4 = 360
270
360
Key skill 1:to learn the number of degrees
around a point
Complete the sheet (bronze task).
Key skill 1:to learn the number of degrees
around a point
How did you do?
180
270
360
Watch Me
Key skill 2 - to find a missing angle around a
point
What does this
mean?
How can we use our knowledge of
angles around a point to find this
missing angle?
Not to scale means
that the angles shown
have not been drawn
using a protractor,
Therefore, measuring
the angles with a
protractor will not help
us to answer the
question.
Watch Me
Key skill 2 - to find a missing angle around
a point
We can use our knowledge of
angles around a point to find
the missing angle. We know
that angles around a point total
360 . Follow the steps below.
Firstly, we need to add together the
size of the known angles.
Secondly, we need to subtract
this value from 360
1 1 5
1 6 0 +
3 6 0
-
2 7 5
2 7 5
1512
8 5
The missing
angle is
worth 85 .
Key skill 2 - to find a missing angle around
a point
Firstly, we need to add together the
size of the known angles.
Secondly, we need to subtract
this value from 360
1 7 5
6 5 +
3 6 0
-
2 4 0
2 4 0
15
1 5
The missing
angle is
worth 115 .
? 175
65
11
1
Key skill 2 - to find a missing angle around a
point
Firstly, we need to add together the
size of the known angles.
Secondly, we need to subtract
this value from 360
?
Key skill 2 - to find a missing angle around a
point
1 2 0
9 5+
2 1 5
1
3 6 0
2 1 5-
15
1 4 5
145
1 7 0
1 5 0+
3 2 0
3 6 0
3 2 0
4 0
-
Answers
4 0
Fluenc
y
Reasoning/Problem
Solving
LO: to calculate missing angles around a point
Complete bronze and silver and then
turn to the moving our learning on
slide.
Moving our learning on:
In my opinion I believe
that
How can we find more
than one missing
angle?
What is the important
information?
Fluenc
y
Reasoning/Problem
Solving
LO: to calculate missing angles around a point
When you are ready, please mark your work.
Let's reflect:
M............., I will remember...