Transcript 1 - Bangkok Patana School

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Today we will be learning to:
• add and subtract
• use words for addition and subtraction
• add several numbers together
• find differences by counting on.
Mental activity
Find pairs of numbers that sum to 12.
1
8
10
5
3
6
11
12
7
4
2
9
Look at number 8.
How many do you count on to get to 12?
4
1
8
10
5
3
6
11
12
7
4
2
9
Now find other pairs of numbers that
sum to 12.
Main Activity
Today we are going to find
missing numbers in magic squares.
This is a magic square.
7
0
5
2
4
6
3
8
1
Each line adds up to the same number.
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
7
0
5
2
4
6
3
8
1
12
What does this line add up to?
12
7
0
5
2
4
6
3
8
1
Complete this magic square.
6
3
9
2
The magic number is 15.
The magic number is 15.
6
3
9
2
Each number 1-9 appears only once in this
magic square.
The magic number is 15.
8
1
6
3
5
7
4
9
2
Did you get them all right?
Group Work
Complete some magic
squares as a group then on
your own.
Complete your own magic
squares.
Complete your own magic
squares.
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