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TÍNH
a,(\(\frac{7}{30}\)x\(\frac{12}{37}\)+\(\frac{12}{30}\)x\(\frac{23}{37}\))x\(\frac{13}{31}\)-\(\frac{-25}{37}\)x\(\frac{18}{31}\)
b,\(\frac{25^2-7x9}{10x15x21}\)
1) Tính hợp lýa)frac{31}{23}-left(frac{7}{32}+frac{8}{32}right)b)left(frac{1}{3}+frac{12}{67}+frac{13}{41}right)-left(frac{79}{67}-frac{28}{41}right)c)frac{38}{45}-left(frac{8}{45}-frac{17}{51}-frac{3}{11}right)d)left(frac{17}{28}+frac{18}{29}-frac{19}{30}-frac{30}{31}right).left(-frac{5}{12}+frac{1}{4}+frac{1}{6}right)
Đọc tiếp
1) Tính hợp lý
a)\(\frac{31}{23}-\left(\frac{7}{32}+\frac{8}{32}\right)\)
b)\(\left(\frac{1}{3}+\frac{12}{67}+\frac{13}{41}\right)-\left(\frac{79}{67}-\frac{28}{41}\right)\)
c)\(\frac{38}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\)
d)\(\left(\frac{17}{28}+\frac{18}{29}-\frac{19}{30}-\frac{30}{31}\right).\left(-\frac{5}{12}+\frac{1}{4}+\frac{1}{6}\right)\)
\(\frac{43}{17}-\frac{31}{29}+\frac{23}{37}-\frac{7}{53}\)
\(\frac{103}{17}-\frac{91}{29}+\frac{46}{37}-\frac{14}{53}\)
bài 1 tính bằng cách hợp lí nếu có thểfrac{-5}{12}-frac{-3}{24}b) 5frac{5}{13}-(1frac{1}{2}+3frac{5}{13})c)frac{-13}{37}.frac{5}{23}+frac{-13}{37}.frac{18}{23}+frac{50}{37}d)(0,5 -frac{3}{2}):1frac{1}{6}+75%bài 2 tìm x biết-7/5 +x -3/4-7/4 + 1/4 : x 3/2
Đọc tiếp
bài 1 tính bằng cách hợp lí nếu có thể
\(\frac{-5}{12}\)-\(\frac{-3}{24}\)=
b) 5\(\frac{5}{13}\)-(1\(\frac{1}{2}+3\frac{5}{13}\))
c)\(\frac{-13}{37}.\frac{5}{23}+\frac{-13}{37}.\frac{18}{23}+\frac{50}{37}\)
d)(0,5 -\(\frac{3}{2}\)):1\(\frac{1}{6}+75\%\)
bài 2 tìm x biết
-7/5 +x = -3/4
-7/4 + 1/4 : x = 3/2
\(\frac{9+\frac{9}{11}+\frac{18}{23}-\frac{27}{37}}{8+\frac{8}{11}+\frac{16}{23}-\frac{24}{37}}-\frac{2+\frac{16}{29}-\frac{24}{13}-\frac{32}{11}}{3+\frac{24}{29}-\frac{36}{13}-\frac{48}{11}}\)
Thuc hien phep tinh
\(\frac{\frac{3}{7}-\frac{3}{17}+\frac{3}{37}}{\frac{5}{7}-\frac{5}{17}+\frac{5}{37}}+\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{\frac{7}{5}-\frac{7}{4}+\frac{7}{3}-\frac{7}{2}}\) =?
\(\left(\frac{112}{13.20}+\frac{112}{20.27}+\frac{112}{37.34}+....+\frac{112}{62.69}\right):\left(\frac{5}{9.13}-\frac{7}{19.25}-\frac{13}{19.25}-\frac{31}{19.69}\right)\)=?
\(\frac{13}{15}\)\(-\left(\frac{13}{21}+x\right)\)\(.\frac{7}{12}\)\(=\frac{7}{10}\)
\(\left(4\frac{5}{37}-3\frac{4}{5}+8\frac{15}{23}\right)\)\(-\left(3\frac{5}{37}-6\frac{14}{29}\right)\)
GIUP MIK ROI MIK TICK CHO
\(\left(\frac{17}{28}+\frac{18}{29}-\frac{19}{30}-\frac{30}{31}\right).\left(-\frac{5}{12}+\frac{1}{4}+\frac{1}{6}\right)\)
Tìm x : \(2x+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}=10\)10