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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: $\LARGE ({1\over3} \ + \ {2\over5})\ \times \ {3\over4}$ (Điền

4/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Lời giải chi tiết

Câu hỏi:

Tính: $\LARGE ({1\over3} \ + \ {2\over5})\ \times \ {3\over4}$

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

A. Đáp án: 11/20

Đáp án án đúng là: A

Lời giải chi tiết:

Hướng dẫn:

$\LARGE ({1\over3} \ + \ {2\over5})\ \times \ {3\over4}=({5\over15}+{6\over15})\times{3\over4}={11\over15}\times{3\over4}={11\over20}$

Đáp số: $\LARGE{11\over20}$ .

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