Tính: <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-1"><span class="MJXp-mstyle" id="MJXp-Span-2"><span class="MJXp-mstyle" id="MJXp-Span-3"><span class="MJXp-mfrac" id="MJXp-Span-4" style="vertical-align: 0.25em;"><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-5">19</span></span><span class="MJXp-box" style="margin-top: -0.9em;"><span class="MJXp-denom"><span><span class="MJXp-rule" style="height: 1em; border-top: none; border-bottom: 1px solid; margin: 0.1em 0px;"></span></span><span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-6">36</span></span></span></span></span></span></span><span class="MJXp-mo" id="MJXp-Span-7" style="margin-left: 0.267em; margin-right: 0.267em;">+</span><span class="MJXp-mstyle" id="MJXp-Span-8"><span class="MJXp-mfrac" id="MJXp-Span-9" style="vertical-align: 0.25em;"><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-10">23</span></span><span class="MJXp-box" style="margin-top: -0.9em;"><span class="MJXp-denom"><span><span class="MJXp-rule" style="height: 1em; border-top: none; border-bottom: 1px solid; margin: 0.1em 0px;"></span></span><span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-11">6</span></span></span></span></span></span></span><span class="MJXp-mo" id="MJXp-Span-12" style="margin-left: 0.267em; margin-right: 0.267em;">−</span><span class="MJXp-mstyle" id="MJXp-Span-13"><span class="MJXp-mfrac" id="MJXp-Span-14" style="vertical-align: 0.25em;"><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-15">13</span></span><span class="MJXp-box" style="margin-top: -0.9em;"><span class="MJXp-denom"><span><span class="MJXp-rule" style="height: 1em; border-top: none; border-bottom: 1px solid; margin: 0.1em 0px;"></span></span><span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-16">18</span></span></span></span></span></span></span><span class="MJXp-mo" id="MJXp-Span-17" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mo" id="MJXp-Span-18" style="margin-left: 0em; margin-right: 0.222em;">.</span><span class="MJXp-mo" id="MJXp-Span-19" style="margin-left: 0em; margin-right: 0.222em;">.</span><span class="MJXp-mo" id="MJXp-Span-20" style="margin-left: 0em; margin-right: 0.222em;">.</span></span></span></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML MJXc-processed" tabindex="0" style="font-size: 127%;"><span id="MJXc-Node-1" class="mjx-math"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mstyle"><span id="MJXc-Node-4" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-5" class="mjx-mstyle"><span id="MJXc-Node-6" class="mjx-mrow"><span id="MJXc-Node-7" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 1.2em; padding: 0px 0.12em;"><span class="mjx-numerator" style="width: 1.2em; top: -1.368em;"><span id="MJXc-Node-8" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">19</span></span></span><span class="mjx-denominator" style="width: 1.2em; bottom: -0.733em;"><span id="MJXc-Node-9" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">36</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 1.2em;"></span></span><span class="mjx-vsize" style="height: 2.1em; vertical-align: -0.733em;"></span></span></span></span><span id="MJXc-Node-10" class="mjx-mo MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.298em; padding-bottom: 0.445em;">+</span></span><span id="MJXc-Node-11" class="mjx-mstyle MJXc-space2"><span id="MJXc-Node-12" class="mjx-mrow"><span id="MJXc-Node-13" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 1.2em; padding: 0px 0.12em;"><span class="mjx-numerator" style="width: 1.2em; top: -1.368em;"><span id="MJXc-Node-14" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">23</span></span></span><span class="mjx-denominator" style="width: 1.2em; bottom: -0.733em;"><span id="MJXc-Node-15" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">6</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 1.2em;"></span></span><span class="mjx-vsize" style="height: 2.1em; vertical-align: -0.733em;"></span></span></span></span><span id="MJXc-Node-16" class="mjx-mo MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.298em; padding-bottom: 0.445em;">−</span></span><span id="MJXc-Node-17" class="mjx-mstyle MJXc-space2"><span id="MJXc-Node-18" class="mjx-mrow"><span id="MJXc-Node-19" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 1.2em; padding: 0px 0.12em;"><span class="mjx-numerator" style="width: 1.2em; top: -1.368em;"><span id="MJXc-Node-20" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">13</span></span></span><span class="mjx-denominator" style="width: 1.2em; bottom: -0.733em;"><span id="MJXc-Node-21" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">18</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 1.2em;"></span></span><span class="mjx-vsize" style="height: 2.1em; vertical-align: -0.733em;"></span></span></span></span><span id="MJXc-Node-22" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-23" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.347em;">.</span></span><span id="MJXc-Node-24" class="mjx-mo MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.347em;">.</span></span><span id="MJXc-Node-25" class="mjx-mo MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.347em;">.</span></span></span></span></span></span></span><script type="math/tex" id="MathJax-Element-1">\Large\dfrac{19}{36} + \dfrac{23}{6}-\dfrac{13}{18}=...</script> (Điề

Tính: $\Large\dfrac{19}{36} + \dfrac{23}{6}-\dfrac{13}{18}=...$ (Điề

4.1/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Lời giải chi tiết

Câu hỏi:

Tính:

$\Large\dfrac{19}{36} + \dfrac{23}{6}-\dfrac{13}{18}=...$

(Điền đáp án dưới dạng phân số tối giản a/b)

A. 131/36

Đáp án án đúng là: A

Lời giải chi tiết:

$\Large = \dfrac{19}{36} + \dfrac{23}{6}-\dfrac{13}{18}$

$\Large = \dfrac{19}{36} + \dfrac{138}{36}-\dfrac{26}{36}$

$\Large = \dfrac{157}{36}-\dfrac{26}{36}$

$\Large = \dfrac{131}{36}$

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