<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="1.44em"><mstyle displaystyle="true" scriptlevel="0"><mfrac><mn>70</mn><mn>157</mn></mfrac></mstyle></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: 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: 1.7em; padding: 0px 0.12em;"><span class="mjx-numerator" style="width: 1.7em; top: -1.378em;"><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;">70</span></span></span><span class="mjx-denominator" style="width: 1.7em; 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;">157</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 1.7em;"></span></span><span class="mjx-vsize" style="height: 2.11em; vertical-align: -0.733em;"></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="1.44em"><mstyle displaystyle="true" scriptlevel="0"><mfrac><mn>70</mn><mn>157</mn></mfrac></mstyle></mstyle></math></span></span><script type="math/tex" id="MathJax-Element-1">\Large \dfrac{70}{157}</script> <span class="MathJax_Preview" style="color: inherit; display: none;"></span><span id="MathJax-Element-2-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.44em"><mstyle displaystyle="true" scriptlevel="0"><mfrac><mn>17</mn><mn>70</mn></mfrac></mstyle></mstyle></math>" role="presentation" style="font-size: 127%; position: relative;"><span id="MJXc-Node-10" class="mjx-math" aria-hidden="true"><span id="MJXc-Node-11" class="mjx-mrow"><span id="MJXc-Node-12" class="mjx-mstyle"><span id="MJXc-Node-13" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-14" class="mjx-mstyle"><span id="MJXc-Node-15" class="mjx-mrow"><span id="MJXc-Node-16" 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: -1.378em;"><span id="MJXc-Node-17" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">17</span></span></span><span class="mjx-denominator" style="width: 1.2em; bottom: -0.733em;"><span id="MJXc-Node-18" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">70</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: 2.11em; vertical-align: -0.733em;"></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="1.44em"><mstyle displaystyle="true" scriptlevel="0"><mfrac><mn>17</mn><mn>70</mn></mfrac></mstyle></mstyle></math></span></span><script type="math/tex" id="MathJax-Element-2">\Large \dfrac{17}{70}</script> \(\Large \dfrac{1

$\Large \dfrac{70}{157}$ $\Large \dfrac{17}{70}$ \(\Large \dfrac{1

4.2/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

Lưu về Facebook:

MỤC LỤC

Lời giải chi tiết

Câu hỏi:

A.
$\Large \dfrac{70}{157}$
B.
$\Large \dfrac{17}{70}$
C.
$\Large \dfrac{175}{70}$
D.
$\Large \dfrac{70}{175}$

Đáp án án đúng là: D

Lời giải chi tiết:

Tổng số phần bằng nhau là:

2 + 5 = 7 (phần)

Tử số là:

245 : 7 x 2 = 70

Mẫu số là:

245 - 70 = 175

Phân số cần tìm là: $\Large \dfrac{70}{175}$

Xem thêm các bài tiếp theo bên dưới