Tính: a) <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">4</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">7</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">5</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">13</span></span></span></span></span></span></span><span class="MJXp-mo" id="MJXp-Span-12" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mo" id="MJXp-Span-13" style="margin-left: 0em; margin-right: 0.222em;">.</span><span class="MJXp-mo" id="MJXp-Span-14" style="margin-left: 0em; margin-right: 0.222em;">.</span><span class="MJXp-mo" id="MJXp-Span-15" style="margin-left: 0em; margin-right: 0.222em;">.</span></span></span></span><script type="math/tex" id="MathJax-Element-1">\Large\dfrac{4}{7}+\dfrac{5}{13}=...</script> b) \(\Large\dfrac{45

Tính: a) 47+513=... b) \(\Large\dfrac{45

4.1/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

Lưu về Facebook:

Câu hỏi:

Tính:

a) 47+513=...

b) 4515×2027=...

c) 2:13=...

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

Đáp án án đúng là: A

Lời giải chi tiết:

a) 47+513=5291+3591=8791

b) 4515×2027=45×2015×27=900540=53

c) 2:13=2×3=6