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How can you multiply using your fingers? How does a soroban speed up your sums? Learn all about addition, subtraction, multiplication, and division - and how you can use simple tricks to make math easier - all in the pages of this book.
How can you multiply using your fingers? How does a soroban speed up your sums? Learn all about addition, subtraction, multiplication, and division - and how you can use simple tricks to make math easier - all in the pages of this book.
