Dạng toán: Tỉ số của 2 số – Toán lớp 6

Kiến thức cần nhớ

1. Thương trong phép chia số $a$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;">

cho số $\displaystyle b\,\left( {b\ne 0} \right)$

gọi là tỉ số của $a$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;">

và $b$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;">

.

2. Muốn tìm tỉ số phần trăm của hai số $a$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;">

và $b$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;">

, ta nhân $a$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-0e55b0b3943237ccfc96979505679274_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="a" title="Rendered by QuickLaTeX.com" height="8" width="9" style="vertical-align: 0px;">

với $100$ rồi chia cho $b$

<img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="pb-seo-lazy ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;"><noscript><img decoding="async" src="http://abcdonline.vn/wp-content/ql-cache/quicklatex.com-ad69adf868bc701e561aa555db995f1f_l3.png" class="ql-img-inline-formula quicklatex-auto-format" alt="b" title="Rendered by QuickLaTeX.com" height="12" width="8" style="vertical-align: 0px;">

và viết kí hiệu $\%$ vào kết quả: $\displaystyle \frac{{a.100}}{b}\%.$

Bài tập vận dụng có lời giải, hướng dẫn

Dạng toán: Tỉ số của 2 số - Toán lớp 6

Dạng toán: Tỉ số của 2 số - Toán lớp 6-1

Dạng toán: Tỉ số của 2 số - Toán lớp 6-2

Dạng toán: Tỉ số của 2 số - Toán lớp 6-3

Số học 6 - Tags: tỉ số, toán 6