Below are videos to show how different written methods are taught at school.
Fractions of number:
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Fractions of shapes:
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Subtraction with missing numbers (using a number line):
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Subtraction (not crossing the tens boundary):
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Subtraction (crossing the tens boundary):
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Partitioning numbers (hundreds, tens and ones using dienes)
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Place value (part/whole model):
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Repeated addition, arrays, number lines (video 2 has partitioning):
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