Tính: <span class="MathJax_Preview" style="color: inherit; display: none;"></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.73em"><mo stretchy="false">(</mo><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>1</mn><mn>3</mn></mfrac></mrow><mtext>&#xA0;</mtext><mo>+</mo><mtext>&#xA0;</mtext><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>2</mn><mn>5</mn></mfrac></mrow><mo stretchy="false">)</mo><mtext>&#xA0;</mtext><mo>&#x00D7;</mo><mtext>&#xA0;</mtext><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>3</mn><mn>4</mn></mfrac></mrow></mstyle></math>" role="presentation" style="font-size: 127%; position: relative;"><span id="MJXc-Node-1" class="mjx-math" aria-hidden="true"><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: 173%;"><span id="MJXc-Node-5" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.445em; padding-bottom: 0.593em;">(</span></span><span id="MJXc-Node-6" class="mjx-texatom"><span id="MJXc-Node-7" class="mjx-mrow"><span id="MJXc-Node-8" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 0.495em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 0.7em; top: -1.268em;"><span id="MJXc-Node-9" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">1</span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 0.7em; bottom: -0.582em;"><span id="MJXc-Node-10" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">3</span></span></span><span class="mjx-line" style="border-bottom: 2.2px solid; top: -0.281em; width: 0.495em;"></span></span><span class="mjx-vsize" style="height: 1.308em; vertical-align: -0.412em;"></span></span></span></span><span id="MJXc-Node-11" class="mjx-mtext"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.293em; padding-bottom: 0.347em;"> </span></span><span id="MJXc-Node-12" 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-13" class="mjx-mtext MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.293em; padding-bottom: 0.347em;"> </span></span><span id="MJXc-Node-14" class="mjx-texatom"><span id="MJXc-Node-15" class="mjx-mrow"><span id="MJXc-Node-16" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 0.495em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 0.7em; top: -1.268em;"><span id="MJXc-Node-17" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">2</span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 0.7em; bottom: -0.583em;"><span id="MJXc-Node-18" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">5</span></span></span><span class="mjx-line" style="border-bottom: 2.2px solid; top: -0.281em; width: 0.495em;"></span></span><span class="mjx-vsize" style="height: 1.309em; vertical-align: -0.412em;"></span></span></span></span><span id="MJXc-Node-19" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.445em; padding-bottom: 0.593em;">)</span></span><span id="MJXc-Node-20" class="mjx-mtext"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.293em; padding-bottom: 0.347em;"> </span></span><span id="MJXc-Node-21" class="mjx-mo MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.199em; padding-bottom: 0.347em;">×</span></span><span id="MJXc-Node-22" class="mjx-mtext MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.293em; padding-bottom: 0.347em;"> </span></span><span id="MJXc-Node-23" class="mjx-texatom"><span id="MJXc-Node-24" class="mjx-mrow"><span id="MJXc-Node-25" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 0.495em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 0.7em; top: -1.289em;"><span id="MJXc-Node-26" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">3</span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 0.7em; bottom: -0.572em;"><span id="MJXc-Node-27" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">4</span></span></span><span class="mjx-line" style="border-bottom: 2.2px solid; top: -0.281em; width: 0.495em;"></span></span><span class="mjx-vsize" style="height: 1.316em; vertical-align: -0.404em;"></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.73em"><mo stretchy="false">(</mo><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>1</mn><mn>3</mn></mfrac></mrow><mtext> </mtext><mo>+</mo><mtext> </mtext><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>2</mn><mn>5</mn></mfrac></mrow><mo stretchy="false">)</mo><mtext> </mtext><mo>×</mo><mtext> </mtext><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>3</mn><mn>4</mn></mfrac></mrow></mstyle></math></span></span><script type="math/tex" id="MathJax-Element-1">\LARGE ({1\over3} \ + \ {2\over5})\ \times \ {3\over4}</script> (Điền

Tính: (13 + 25) × 34 (Điền

4/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Câu hỏi:

Tính: (13 + 25) × 34

(Điền kết quả là phân số tối giản dưới dạng a/b)

Đáp án án đúng là: A

Lời giải chi tiết:

Hướng dẫn:

(13 + 25) × 34=(515+615)×34=1115×34=1120

Đáp số: 1120.