How to Subtract 2 from the Sum on Abacus | Fast Mental Math | Learn abacus with Sara Memon |

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Learn Abacus with Sara

7 years ago

How to Subtract 2 from the Sum on Abacus | Fast Mental Math | Learn abacus with Sara Memon |

How to Subtract 2 from the Sum on Abacus | Fast Mental Math | Learn abacus with Sara Memon |