docx, 174.53 KB
docx, 174.53 KB
Practises using the diagrammatic form of the mental operation as used in Singapore text books.
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4.3

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andyscorch

6 years ago
3

angela5000

6 years ago
5

Just what I wanted!

sfreck

6 years ago
5

Thank you . Nice method and layout<br />

angieriga

7 years ago
4

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