{"id":21879,"date":"2021-04-10T04:04:11","date_gmt":"2021-04-10T02:04:11","guid":{"rendered":"https:\/\/xmau.com\/wp\/notiziole\/?p=21879"},"modified":"2021-03-05T16:38:29","modified_gmt":"2021-03-05T15:38:29","slug":"maths-on-the-back-of-an-envelope-ebook","status":"publish","type":"post","link":"https:\/\/xmau.com\/wp\/notiziole\/2021\/04\/10\/maths-on-the-back-of-an-envelope-ebook\/","title":{"rendered":"<i>Maths on the Back of an Envelope<\/i> (ebook)"},"content":{"rendered":"<div class='__iawmlf-post-loop-links' style='display:none;' data-iawmlf-post-links='[{&quot;id&quot;:3222,&quot;href&quot;:&quot;https:\\\/\\\/amzn.to\\\/3scKSBJ&quot;,&quot;archived_href&quot;:&quot;&quot;,&quot;redirect_href&quot;:&quot;https:\\\/\\\/www.amazon.it\\\/Maths-Back-Envelope-calculate-anything-ebook\\\/dp\\\/B07Q1YY1C5\\\/ref=as_li_ss_tl?_encoding=UTF8&amp;qid=1610355057&amp;sr=8-1&amp;linkCode=sl1&amp;tag=notizioledima-21&amp;linkId=4d3d4cfa7addd89cb7209d0f978adf03&amp;language=it_IT&quot;,&quot;checks&quot;:[],&quot;broken&quot;:false,&quot;last_checked&quot;:null,&quot;process&quot;:&quot;done&quot;}]'><\/div>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/xmau.com\/wp\/notiziole\/wp-content\/uploads\/sites\/6\/2021\/03\/9780008324599.jpg?resize=132%2C200&#038;ssl=1\" alt=\"\" width=\"132\" height=\"200\" class=\"alignleft size-full wp-image-21866\" \/> Rob Eastaway \u00e8 un noto divulgatore matematico britannico. In questo libro (Rob Eastaway, <em><a href=\"https:\/\/amzn.to\/3scKSBJ\">Maths on the Back of an Envelope<\/a> : Clever ways to (roughly) calculate anything<\/em>, HarperCollins 2019, pag. 208, &euro; 7,29 (cartaceo: Lst 9.99), ISBN 9780008324599) si \u00e8 dedicato alla spannometria. In realt\u00e0 il suo approccio \u00e8 pi\u00f9 ampio. La spannometria vera e propria &#8211; i problemi di Fermi &#8211; sono solo verso la fine, mentre nelle sezioni iniziali del libro Eastaway mette in guardia contro la troppa precisione e insegna un po&#8217; di trucchi del mestiere, oltre che introdurre il suo Zequals (un uguale disegnato coi dentini a sega, per dire che si taglia via tutto tranne la cifra pi\u00f9 significativa). Direi che il libro \u00e8 assolutamente valido per tutti, giovani e meno giovani; leggendolo, imparerete anche a saper non usare la calcolatrice, o almeno a saperla usare con cognizione di causa!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spannometria pratica<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":3,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[946,534],"tags":[],"class_list":["post-21879","post","type-post","status-publish","format-standard","hentry","category-recensioni-2021","category-recensioni"],"modified_by":".mau.","jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p6hcSh-5GT","jetpack-related-posts":[{"id":8679,"url":"https:\/\/xmau.com\/wp\/notiziole\/2011\/12\/17\/matematica_per_\/","url_meta":{"origin":21879,"position":0},"title":"_Matematica per mamme e pap\u00e0_ (libro)","author":".mau.","date":"2011-12-17","format":false,"excerpt":"Reimparate la matematica seguendo i vostri figli!","rel":"","context":"In &quot;recensioni&quot;","block_context":{"text":"recensioni","link":"https:\/\/xmau.com\/wp\/notiziole\/category\/recensioni\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":26348,"url":"https:\/\/xmau.com\/wp\/notiziole\/2023\/05\/17\/national-numeracy-day-e-numerismo\/","url_meta":{"origin":21879,"position":1},"title":"National Numeracy Day e numerismo","author":".mau.","date":"2023-05-17","format":false,"excerpt":"no, non da noi, ma in UK","rel":"","context":"In &quot;matematica_light&quot;","block_context":{"text":"matematica_light","link":"https:\/\/xmau.com\/wp\/notiziole\/category\/matematica_light\/"},"img":{"alt_text":"logo","src":"https:\/\/i0.wp.com\/xmau.com\/wp\/notiziole\/wp-content\/uploads\/sites\/6\/2023\/05\/numeracy.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":4291,"url":"https:\/\/xmau.com\/wp\/notiziole\/2006\/07\/18\/how_long_is_a_piece_of_string\/","url_meta":{"origin":21879,"position":2},"title":"_How long is a piece of string?_ (libro)","author":".mau.","date":"2006-07-18","format":false,"excerpt":"ottima divulgazione matematica, senza troppe formule per non spaventare nessuno","rel":"","context":"Con 2 commenti","block_context":{"text":"Con 2 commenti","link":"https:\/\/xmau.com\/wp\/notiziole\/2006\/07\/18\/how_long_is_a_piece_of_string\/#comments"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":20771,"url":"https:\/\/xmau.com\/wp\/notiziole\/2020\/08\/15\/mindbenders-and-brainteasers-ebook\/","url_meta":{"origin":21879,"position":3},"title":"Mindbenders and Brainteasers (ebook)","author":".mau.","date":"2020-08-15","format":false,"excerpt":"Problemini matematici e logici di ottima fattura","rel":"","context":"In &quot;rec-2020&quot;","block_context":{"text":"rec-2020","link":"https:\/\/xmau.com\/wp\/notiziole\/category\/recensioni\/recensioni-2020\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/xmau.com\/wp\/notiziole\/wp-content\/uploads\/sites\/6\/2020\/07\/9781909396845.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":25843,"url":"https:\/\/xmau.com\/wp\/notiziole\/2023\/02\/15\/david-singmaster\/","url_meta":{"origin":21879,"position":4},"title":"David Singmaster","author":".mau.","date":"2023-02-15","format":false,"excerpt":"L\"esperto del cubo di Rubik e della storia della matematica ricreativa.","rel":"","context":"In &quot;obituary&quot;","block_context":{"text":"obituary","link":"https:\/\/xmau.com\/wp\/notiziole\/category\/obituary\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":7648,"url":"https:\/\/xmau.com\/wp\/notiziole\/2010\/01\/26\/why_do_buses_co\/","url_meta":{"origin":21879,"position":5},"title":"_Why do Buses Come in Threes?_ (libro)","author":".mau.","date":"2010-01-26","format":false,"excerpt":"Finalmente vengono svelati alcuni misteri della vita di tutti i giorni!","rel":"","context":"In 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