\r\n\r\n
\\(\\Large({8\\dfrac{2}{5}+5\\dfrac{3}{4}})\\times\\dfrac{1}{2}=\\dfrac{153}{40}\\)
\r\n\r\nĐúng hay sai ?
\r\n","dateCreated":"2022-08-18T19:47:09.017Z","answerCount":6095,"author":{"@type":"Person","name":"Hoc357.edu.vn"},"acceptedAnswer":{"@type":"Answer","upvoteCount":95,"text":"\\(\\Large({8 \\dfrac{2}{5}+5\\dfrac{3}{4}})\\times \\dfrac{1}{2}\\)
\r\n\r\n= \\(\\Large(\\dfrac{42}{5}+ \\dfrac{23}{4})\\times \\dfrac{1}{2}\\)
\r\n\r\n= \\(\\Large(\\dfrac{168}{20}+\\dfrac{115}{20})\\times \\dfrac{1}{2}\\)
\r\n\r\n= \\(\\Large \\dfrac{283}{20}\\times \\dfrac{1}{2}\\)
\r\n\r\n= \\(\\Large \\dfrac{283}{40}\\)
\r\n","url":"https://hoc357.edu.vn/cau-hoi/lua-chon-dap-an-dung-nhat-large8dfrac255dfrac34ti-v7920","dateCreated":"2022-08-18T19:47:09.017Z","author":{"@type":"Person","name":"Trần Thanh Hùng"}},"suggestedAnswer":[]}}MỤC LỤC
Lựa chọn đáp án đúng nhất :
\(\Large({8\dfrac{2}{5}+5\dfrac{3}{4}})\times\dfrac{1}{2}=\dfrac{153}{40}\)
Đúng hay sai ?
Lời giải chi tiết:
\(\Large({8 \dfrac{2}{5}+5\dfrac{3}{4}})\times \dfrac{1}{2}\)
= \(\Large(\dfrac{42}{5}+ \dfrac{23}{4})\times \dfrac{1}{2}\)
= \(\Large(\dfrac{168}{20}+\dfrac{115}{20})\times \dfrac{1}{2}\)
= \(\Large \dfrac{283}{20}\times \dfrac{1}{2}\)
= \(\Large \dfrac{283}{40}\)
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