{"id":613,"date":"2024-02-14T19:26:53","date_gmt":"2024-02-15T03:26:53","guid":{"rendered":"https:\/\/www.rightlobemath.com\/blog\/?p=613"},"modified":"2020-02-20T22:13:05","modified_gmt":"2020-02-21T06:13:05","slug":"build-calculation-speed-practicing-the-10-pair-complements","status":"publish","type":"post","link":"https:\/\/sumomath.com\/content\/build-calculation-speed-practicing-the-10-pair-complements\/","title":{"rendered":"Build Calculation Speed Practicing the 10 Pair Complements"},"content":{"rendered":"<div class=\"embed-container\"><iframe loading=\"lazy\" title=\"Practice the 5 Complement Pairs to Build Calculation Speed\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/RDtYgRFYJtY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>The main method of addition and subtraction on the abacus is understanding and using the 5 complement pairs&nbsp;of 10, i.e. pairs of numbers that add to 10. There are only 5 complement pairs&nbsp;in our base 10 numbering system: 9 and 1, 8 and 2, 7 and 3, 6 and 4, and 5 and 5.&nbsp;The faster students can recall the 10 pair complements, the faster they can add and subtract on the soroban. So students should&nbsp;practice recalling all of the 10 pair complements with the goal of reaching instant recall. Here a couple good 10 pair complement&nbsp;activities to practice recalling the pairs as fast as possible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The main method of addition and subtraction on the abacus is understanding and using the 5 complement pairs&nbsp;of 10, i.e. pairs of numbers that add to 10. There are only 5 complement pairs&nbsp;in our base 10 numbering system: 9 and 1, 8 and 2, 7 and 3, 6 and 4, and 5 and 5.&nbsp;The faster<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-613","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/posts\/613"}],"collection":[{"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/comments?post=613"}],"version-history":[{"count":0,"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/posts\/613\/revisions"}],"wp:attachment":[{"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/media?parent=613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/categories?post=613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sumomath.com\/content\/wp-json\/wp\/v2\/tags?post=613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}