Chuyển các hỗn số sau thành phân số:
2 3 5 ; 5 4 9 ; 9 3 8 ; 12 7 10
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\(2\dfrac{3}{4}=\dfrac{2\times4+3}{4}=\dfrac{11}{4}\\ 3\dfrac{4}{5}=\dfrac{3\times5+4}{5}=\dfrac{19}{5}\\ 4\dfrac{3}{5}=\dfrac{4\times5+3}{5}=\dfrac{23}{5}\\ 11\dfrac{12}{13}=\dfrac{11\times13+12}{13}=\dfrac{155}{13}\\ 12\dfrac{11}{13}=\dfrac{12\times13+11}{13}=\dfrac{167}{13}\\ 3\dfrac{3}{5}=\dfrac{3\times5+3}{5}=\dfrac{18}{5}\)
2\(\dfrac{3}{4}\)=\(\dfrac{11}{4}\)
3\(\dfrac{4}{5}\)=\(\dfrac{19}{5}\)
4\(\dfrac{3}{5}\)=\(\dfrac{23}{5}\)
11\(\dfrac{12}{13}\)=\(\dfrac{155}{13}\)
12\(\dfrac{11}{13}\)=\(\dfrac{167}{13}\)
3\(\dfrac{3}{5}\)=\(\dfrac{18}{5}\).
a) 28/140=0.2 b) 2 23/75=2.3066
33/75=0.44 4 216/900=4.24
261/900=0.29 1 415/1250=1.332
415/1250=0.332 5 28/140=5.2
2 3/5 = 13/5
5 4/9= 49/9
9 3/8 =75/8
12 7/10= 127/10
Đúng ko
K mk nha
23/4=\(5\dfrac{3}{4}\)
41/5=\(8\dfrac{1}{5}\)
57/6=\(9\dfrac{3}{6}\)
-26/6=\(-4\dfrac{2}{6}\)
-8/3=\(-2\dfrac{2}{3}\)
\(\dfrac{23}{4}=5\dfrac{3}{4}\)
\(\dfrac{41}{5}=8\dfrac{1}{5}\)
\(\dfrac{57}{6}=9\dfrac{3}{6}\)
\(-\dfrac{26}{6}=-4\dfrac{2}{6}\)
\(-\dfrac{8}{3}=-2\dfrac{2}{3}\)
\(5\dfrac{3}{7}=\dfrac{38}{7},8\dfrac{1}{2}=\dfrac{17}{2},12\dfrac{5}{6}=\dfrac{77}{6}\)
5\(\dfrac{3}{7}\) = \(\dfrac{38}{7}\)
8\(\dfrac{1}{2}\) = \(\dfrac{17}{2}\)
12\(\dfrac{5}{6}\) = \(\dfrac{77}{6}\)
7/3/8 - 4/5/8 = 59/8 - 37/8 = 12
2/1/4 +5/1/4 = 9/4 + 21/4 = 15/2
3/1/4 x 2/3/5 = 13/4 x 13/5 =11/20
\(7\frac{3}{8}-4\frac{5}{8}=\frac{59}{8}-\frac{37}{8}=\frac{22}{8}\)\(=\)\(2,75\)
\(2\frac{1}{4}+5\frac{1}{4}=\frac{9}{4}+\frac{21}{4}=\frac{30}{4}=7,5\)
\(3\frac{1}{4}\times2\frac{3}{5}=\frac{13}{4}\times\frac{13}{5}=\frac{169}{20}=8,45\)
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