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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 divisionand how you can use simple tricks to make math easierall 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 divisionand how you can use simple tricks to make math easierall in the pages of this book.