12 Jan Cranmer Abacus Using rules 1-5 to add quickly – YouTube
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abacus Tag
12 Jan Cranmer Abacus–learn the rules to subtract by 1 – YouTube
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12 Jan Cranmer Abacus–learn the rules to subtract by 2 – YouTube
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04 Jan Cranmer Abacus for Math-introduction and begin adding – YouTube
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28 Dec (1) Cranmer Abacus–Rules of Setting 3- great tricks to learn math fast – YouTube
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26 Dec (25) Cranmer Abacus–rules of counting by 4 – YouTube
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26 Dec (25) Cranmer Abacus- Rule of 5 and addiing #1-5 double and triple digits – YouTube
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26 Dec (25) Cranmer Abacus-Subtraction using the rules of 1-5 – YouTube
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