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a)\(\dfrac{5}{7}+\dfrac{4}{9}=\dfrac{45}{63}+\dfrac{28}{63}=\dfrac{73}{63}\) ; \(\dfrac{9}{11}+\dfrac{3}{8}=\dfrac{72}{88}+\dfrac{33}{88}=\dfrac{105}{88}\)
\(\dfrac{4}{5}-\dfrac{2}{3}=\dfrac{12}{15}-\dfrac{10}{15}=\dfrac{2}{15}\); \(\dfrac{16}{25}-\dfrac{2}{5}=\dfrac{16}{25}-\dfrac{10}{25}=\dfrac{6}{25}\)
b)\(5+\dfrac{3}{5}=\dfrac{25}{5}+\dfrac{3}{5}=\dfrac{28}{5};10-\dfrac{9}{16}=\dfrac{160}{16}-\dfrac{9}{16}=\dfrac{151}{16}\)
\(\dfrac{2}{3}-\left(\dfrac{1}{6}+\dfrac{1}{8}\right)=\dfrac{2}{3}-\left(\dfrac{8}{48}+\dfrac{6}{48}\right)=\dfrac{2}{3}-\dfrac{14}{48}=\dfrac{32}{48}-\dfrac{14}{48}=\dfrac{3}{8}\)
các phân số bằng nhau là :
\(\frac{15}{25}=\frac{21}{35}=\frac{3}{5}=\frac{75}{125}\)
\(\frac{7}{4}=\frac{49}{28}=\frac{105}{60}\)
a ,Ta có : 14/25 < 15/25 = 3/5
Ta có : 1 - 3/5 = 2/5
1 - 5/7 = 2/7
Nên 2/5 > 2/7
Vậy 14/25 < 5/7
\(\frac{2010}{2011}< \frac{2011}{2012}\)
\(\frac{11}{12}=\frac{22}{24}\)
\(\frac{25}{30}>\frac{25}{49}\)
\(\frac{1}{5}< \frac{3}{8}\)
\(\frac{1995}{1997}< \frac{1995}{1996}\)
\(a,\frac{10}{21}×\frac{14}{25}=\frac{4}{15}\)
\(b,3\frac{1}{3}×\frac{12}{35}=\frac{10}{3}×\frac{12}{35}=\frac{8}{7}\)
\(c,\frac{7}{15}×\frac{11}{13}+\frac{7}{15}×\frac{2}{13}+\frac{8}{15}=\frac{7}{15}+\frac{8}{15}=1\)
\(d,\left(\frac{41}{75}+\frac{17}{10}\right)×\frac{80}{129}=\frac{4}{9}\)
1.
a) \(\frac{16}{24}-\frac{1}{3}=\frac{16}{24}-\frac{8}{24}=\)\(\frac{8}{24}=\frac{1}{3}\)
b) \(\frac{4}{5}-\frac{12}{60}=\frac{48}{60}-\frac{12}{60}=\frac{36}{60}=\frac{9}{15}\)
3.
a)\(\frac{17}{6}-\frac{2}{6}=\frac{17-2}{6}=\frac{15}{6}\)
b) \(\frac{16}{15}-\frac{11}{15}=\frac{16-11}{15}=\frac{5}{15}=\frac{1}{3}\)
c) \(\frac{19}{12}-\frac{13}{12}=\frac{19-13}{12}=\frac{6}{12}=\frac{1}{2}\)
a) 16 24 − 1 3 = 16 24 − 8 24 = 24 16 − 3 1 = 24 16 − 24 8 = 8 24 = 1 3 24 8 = 3 1 b) 4 5 − 12 60 = 48 60 − 12 60 = 36 60 = 9 15 5 4 − 60 12 = 60 48 − 60 12 = 60 36 = 15 9 3. a) 17 6 − 2 6 = 17 − 2 6 = 15 6 6 17 − 6 2 = 6 17−2 = 6 15 b) 16 15 − 11 15 = 16 − 11 15 = 5 15 = 1 3 15 16 − 15 11 = 15 16−11 = 15 5 = 3 1 c) 19 12 − 13 12 = 19 − 13 12 = 6 12 = 1 2 12 19 − 12 13 = 12 19−13 = 12 6 = 2 1
a) \(\frac{55}{32}\)
b) \(\frac{90}{48}\)
c) \(\frac{76}{15}\)
d) \(\frac{552}{119}\)
\(\frac{9}{16}+\frac{37}{32}=\frac{18}{32}+\frac{37}{32}=\frac{55}{32}\)
\(\frac{126}{48}-\frac{12}{16}=\frac{21}{8}-\frac{6}{8}=\frac{15}{8}\)
\(\frac{19}{15}\times\frac{32}{8}=\frac{19}{15}\times4=\frac{76}{15}\)
\(\frac{23}{17}:\frac{7}{24}=\frac{23}{17}.\frac{24}{7}=4\frac{76}{119}\)
A=1/2
B=5/49
C=42/25
TÍCH cho mik đi
a) \(\frac{15}{16}-\frac{7}{16}=\frac{8}{16}=\frac{1}{2}\)
b) \(\frac{17}{49}-\frac{12}{49}=\frac{5}{49}\)
c) \(\frac{35}{25}+\frac{7}{25}=\frac{42}{25}\)
a,\(=\frac{15-7}{16}=\frac{8}{16}=\frac{1}{2}\)
b,\(=\frac{17-12}{49}=\frac{5}{49}\)
c,\(=\frac{35+7}{25}=\frac{42}{25}\)
hok tốt
a)1/2
b)5/49
c)42/25
a)\(\frac{15}{16}-\frac{7}{16}=\frac{8}{16}=\frac{2}{3}\)
b)\(\frac{17}{49}-\frac{12}{49}=\frac{5}{49}\)
c)\(\frac{35}{25}+\frac{7}{25}=\frac{42}{25}\)
Trả lời :
a) \(\frac{15}{16}-\frac{7}{16}=\frac{1}{2}\)
b) \(\frac{17}{49}-\frac{12}{49}=\frac{5}{49}\)
c) \(\frac{35}{25}-\frac{7}{25}=\frac{28}{25}\)
Học tốt
sorry, A)\(\frac{8}{16}=\frac{1}{2}\)
a,\(\frac{15}{16}-\frac{7}{16}=\frac{8}{16}=\frac{1}{2}\)
b, \(\frac{17}{49}-\frac{12}{49}=\frac{5}{49}\)
c, \(\frac{35}{25}+\frac{7}{25}=\frac{42}{25}\)
\(a,\)\(\frac{15}{16}-\frac{7}{16}=\frac{1}{2}\)
\(\frac{17}{49}-\frac{12}{49}=\frac{5}{49}\)
\(\frac{35}{25}+\frac{7}{25}=\frac{42}{25}\)
\(a.\frac{15}{16}-\frac{7}{16}=\frac{15-7}{16}=\frac{8}{16}=\frac{1}{2}\)
\(b.\frac{17}{49}-\frac{12}{49}=\frac{17-12}{49}=\frac{5}{49}\)
\(c.\frac{35}{25}+\frac{7}{25}=\frac{35+7}{25}=\frac{42}{25}\)
a) \(\frac{8}{16}\)= \(\frac{1}{2}\)
b) \(\frac{5}{49}\)
c) \(\frac{42}{25}\)
Chuc ban hoc tot
a)\(\frac{15}{16}-\frac{7}{16}=\frac{15-7}{16}=\frac{8}{16}=\frac{1}{2}\)
b)\(\frac{17}{49}-\frac{12}{49}=\frac{17-12}{49}=\frac{5}{49}\)
c)\(\frac{35}{25}+\frac{7}{25}=\frac{35+7}{25}=\frac{42}{25}\)
~ Hok tốt ~
viết phần kiểu gì vậy ?
a. \(\frac{15}{16}\)- \(\frac{7}{16}\)= \(\frac{1}{2}\)
b. \(\frac{17}{49}\)- \(\frac{12}{49}\)= \(\frac{5}{49}\)
c. \(\frac{35}{25}\)+ \(\frac{7}{25}\)= \(\frac{42}{25}\)
~ hok tốt ~