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Line 3: ==Grid method== {{main\|Grid method multiplication}} The [[grid method multiplication\|grid method]] (or box method) is an ~~introductory~~intrhjjjjoductory method for multiple-digit multiplication that is often taught to pupils at [[primary school]] or [[elementary school]] level. It has been a standard part of the national primary-school mathematics curriculum in England and Wales since the late 1990s.<ref>Gary Eason, [http://news.bbc.co.uk/1/hi/education/639937.stm Back to school for parents], ''[[BBC News]]'', 13 February 2000<br>[[Rob Eastaway]], [https://www.bbc.co.uk/news/magazine-11258175 Why parents can't do maths today], ''[[BBC News]]'', 10 September 2010</ref> Both factors are broken up ("partitioned") into their hundreds, tens and units parts, and the products of the parts are then calculated explicitly in a relatively simple multiplication-only stage, before these contributions are then totalled to give the final answer in a separate addition stage.

Multiplication algorithm: Difference between revisions