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2.3 Multiplying by 3. 2.4 Multiplying by 4. ... Print/export Download as PDF; Printable version; In other projects Wikidata item;
Print/export Download as PDF; Printable version; ... Indeed, multiplication by 3, followed by division by 3, yields the original number. The division of a number ...
First multiply the quarters by 47, the result 94 is written into the first workspace. Next, multiply cwt 12*47 = (2 + 10)*47 but don't add up the partial results (94, 470) yet. Likewise multiply 23 by 47 yielding (141, 940). The quarters column is totaled and the result placed in the second workspace (a trivial move in this case).
Evaluating the multiplication starts from the units column. The tip of each triangle points to the next digit of the result. The digits visited, by following the triangles from base to tip are those of the desired product: 210996.
Another method is multiplication by 3. A number of the form 10x + y has the same remainder when divided by 7 as 3x + y. One must multiply the leftmost digit of the original number by 3, add the next digit, take the remainder when divided by 7, and continue from the beginning: multiply by 3, add the next digit, etc.
In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for arithmetic operations ...