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\(x-67421=5678\)
\(x=5678+67421\)
\(x=73099\)
\(x-\left(562+236\right)x5=569\)
\(x-798=569:5\)
\(x-798=113,8\)
\(x=113,8+798\)
\(x=911,8\)
\(x-231x3=263\)
\(x-693=263\)
\(x=263+693\)
\(x=956\)
\(x-560:4=426x9\)
\(x-140=3834\)
\(x=3834+140\)
\(x=3974\)
\(\frac{90}{100}=\frac{90:10}{100:10}=\frac{9}{10}\)
\(\frac{64}{128}=\frac{64:64}{128:64}=\frac{1}{2}\)
\(\frac{17}{51}=\frac{17:17}{51:17}=\frac{1}{3}\)
\(\frac{152}{608}=\frac{152:152}{608:152}=\frac{1}{4}\)
\(\frac{63}{315}=\frac{63:63}{315:63}=\frac{1}{5}\)
\(\frac{11}{132}=\frac{1}{12}\)
\(\frac{63}{91}=\frac{9}{13}\)
\(\frac{270}{450}=\frac{3}{5}\)
\(\frac{51}{680}=\frac{3}{40}\)
\(\frac{225}{315}=\frac{5}{7}\)
\(\frac{234}{1404}=\frac{1}{6}\)
\(\frac{11}{132}=\frac{11:11}{132:11}=\frac{1}{12}\)
\(\frac{63}{91}=\frac{63:7}{91:7}=\frac{9}{13}\)
\(\frac{270}{450}=\frac{270:90}{450:90}=\frac{3}{5}\)
\(\frac{51}{680}=\frac{51:17}{680:17}=\frac{3}{40}\)
\(\frac{225}{315}=\frac{225:45}{315:45}=\frac{5}{7}\)
\(\frac{234}{1404}=\frac{234:234}{1404:234}=\frac{1}{6}\)
\(\frac{16}{3}:\frac{8}{3}=\frac{16}{3}\times\frac{3}{8}=\frac{16}{8}=2\)
\(\frac{63}{35}:\frac{21}{5}=\frac{63}{35}.\frac{5}{21}=\frac{3}{7}.\frac{1}{1}=\frac{3}{7}\)
\(\frac{8}{14}\times\frac{7}{8}=\frac{7}{14}=\frac{1}{2}\)
\(\frac{19}{14}\times\frac{7}{15}=\frac{19}{2}\times\frac{1}{15}=\frac{19}{30}\)
\(a,\frac{16}{3}:\frac{8}{3}=\frac{16}{3}\times\frac{3}{8}=\frac{8\times2\times3}{3\times8}=2\)
\(b,\frac{63}{35}:\frac{21}{5}=\frac{63}{35}\times\frac{5}{21}=\frac{21\times3\times5}{5\times7\times21}=\frac{3}{7}\)
\(c,\frac{8}{14}\times\frac{7}{8}=\frac{8\times7}{7\times2\times8}=\frac{1}{2}\)
\(d,\frac{19}{14}\times\frac{7}{15}=\frac{19\times7}{7\times2\times15}=\frac{19}{30}\)
Học tốt
Vì \(\frac{5}{7}=\frac{x}{63}\)nên 5.63 = 7.x
=> \(\frac{5.63}{7}\)= 45
Vậy x = 45
\(\frac{5}{7}=\frac{x}{63}\)
=> 63 . 5 = 7.x
=> 315 = 7x
=> x = \(\frac{315}{7}=45\)
Trả lời :
1523 + 263 = 1786
9133 - 236 = 8897
63 x 23 = 1449
3956 : 86 = 46
~ Hok tốt ~
Trả lời :
1523 + 263 = 1786
9133 - 236 = 8897
63 x 23 = 1449
3956 : 86 = 46
# Linh_Chymtee2k7 ~ Yew thw #