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\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=\frac{15}{15}+\frac{13}{13}\)
\(=1+1\)
\(=2\)
Chúc bạn học tốt nha !!!
\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=1+1\)
\(=2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1gio15phut+75phut+1,25gio\times8\)
\(=1gio15phut+1gio15phut+10gio\)
\(=2gio30phut+10gio\)
\(=12gio30phut\)
1 giờ 15 phút + 75 phút + 1,25 giờ `xx8`
= 1,25 giờ + 1,25 giờ + 1,25 giờ `xx8`
= 1,25 giờ `xx` (1+1+8)`
= 1,25 giờ `xx` 10
= 12,5 giờ
![](https://rs.olm.vn/images/avt/0.png?1311)
=\(\frac{19}{11}+\frac{3}{11}+\frac{8}{13}\)
=\(2+\frac{8}{13}\)
=\(2\frac{8}{13}\)
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8,12 x 6 + 16,24 x 4 - 4,06 x 8
=48,72 + 64,96 - 32,48
= 113,68 - 32,48
=81 ,2
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\(\frac{9}{5}:\frac{17}{15}+\frac{8}{5}:\frac{17}{15}\)
\(=\frac{17}{15}:\left(\frac{9}{5}+\frac{8}{5}\right)\)
\(=\frac{17}{15}:3\)
\(=\frac{17}{45}\)
\(\frac{9}{5}:\frac{17}{15}+\frac{8}{5}:\frac{17}{5}=\frac{9}{5}.\frac{15}{17}+\frac{8}{5}.\frac{15}{17}=\frac{15}{17}\left(\frac{9}{5}+\frac{8}{5}\right)=\frac{15}{17}.\frac{17}{5}=3\)
653,6 : 0,125 x 5:8
=(653,6x5)x (0,125x8)
=3268 x1
=3268
653,6 : 0,125 x 5 : 8
= (653,6 x 5) : (0,125 x 8)
= 3178: 1
= 3178
tk nha bạn
thank you bạn
(^_^)