Bài 10: Phép nhân phân số
Các câu hỏi tương tự
X/2018-1/70-1/15-1/21-...-1/120=5/8
(11/12+11/12.23+11/23.34+....+2/89.100)+x=5/3
(2'11.13+2/13.15+...+2/19.21)-x+4+221/231=7/3
Tính một cách hợp lý:
aleft(dfrac{1}{2}-1right)left(dfrac{1}{3}-1right)...left(dfrac{1}{100}-1right)) x:dfrac{99}{100}:dfrac{98}{99}:...:dfrac{2}{3}:dfrac{1}{2}
b) dfrac{5-dfrac{5}{3}+dfrac{5}{9}-dfrac{5}{27}}{8-dfrac{8}{3}+dfrac{8}{9}-dfrac{8}{27}}:dfrac{15-dfrac{15}{11}+dfrac{15}{121}}{16-dfrac{16}{11}+dfrac{16}{121}}
c) dfrac{dfrac{1}{9}-dfrac{5}{6}-4}{dfrac{7}{12}-dfrac{1}{36}-10}
d) left(dfrac{1}{2}+1right)left(dfrac{1}{3}+1right)...left(dfrac{1}{99}+1right)
e)
Đọc tiếp
Tính một cách hợp lý:
a\(\left(\dfrac{1}{2}-1\right)\left(\dfrac{1}{3}-1\right)...\left(\dfrac{1}{100}-1\right)\)) \(x:\dfrac{99}{100}:\dfrac{98}{99}:...:\dfrac{2}{3}:\dfrac{1}{2}\)
b) \(\dfrac{5-\dfrac{5}{3}+\dfrac{5}{9}-\dfrac{5}{27}}{8-\dfrac{8}{3}+\dfrac{8}{9}-\dfrac{8}{27}}:\dfrac{15-\dfrac{15}{11}+\dfrac{15}{121}}{16-\dfrac{16}{11}+\dfrac{16}{121}}\)
c) \(\dfrac{\dfrac{1}{9}-\dfrac{5}{6}-4}{\dfrac{7}{12}-\dfrac{1}{36}-10}\)
d) \(\left(\dfrac{1}{2}+1\right)\left(\dfrac{1}{3}+1\right)...\left(\dfrac{1}{99}+1\right)\)
e)
Tìm \(x\), biết :
a) \(x-\dfrac{1}{4}=\dfrac{5}{8}.\dfrac{2}{3}\)
b) \(\dfrac{x}{126}=\dfrac{-5}{9}.\dfrac{4}{7}\)
a) dfrac{-21}{15}.dfrac{-10}{14} b)left(-dfrac{2}{3}right)^2 c)dfrac{-3}{4}.dfrac{-4}{5}.dfrac{16}{9} d)dfrac{-8}{3}.dfrac{5}{6} e)dfrac{16}{30}.dfrac{5}{12} f) dfrac{13}{30}.dfrac{-1}{5} g)dfrac{2}{21}.dfrac{3}{28} h)left(dfrac{-3}{4}right)^3
Đọc tiếp
a) \(\dfrac{-21}{15}\).\(\dfrac{-10}{14}\) b)\(\left(-\dfrac{2}{3}\right)^2\) c)\(\dfrac{-3}{4}\).\(\dfrac{-4}{5}\).\(\dfrac{16}{9}\) d)\(\dfrac{-8}{3}\).\(\dfrac{5}{6}\) e)\(\dfrac{16}{30}\).\(\dfrac{5}{12}\) f) \(\dfrac{13}{30}\).\(\dfrac{-1}{5}\) g)\(\dfrac{2}{21}\).\(\dfrac{3}{28}\) h)\(\left(\dfrac{-3}{4}\right)^3\)
x+1/6=x+8/3
giúp mk làm bài này với :>>>>
x+1 x+8
-----+------- giải hộ mình với nha :>>>>>>>>
6 3
Tính:
a,(1-1/5)x(1-2/5)x(1-3/5)x.....x(1-9/5)
b,1/2x2/3x3/4x4/5x.....x9/10
-15/12 . x+ 3/7=6/5 .x -1/2
Câu 1 :dfrac{-5}{7}.dfrac{7}{-45};dfrac{-3}{10}.left(-30right);-12.dfrac{-2}{36}Câu 2: dfrac{3}{4}+dfrac{1}{8}.dfrac{-16}{5};dfrac{7}{15}-dfrac{18}{21}.dfrac{7}{9}Câu 3: left(dfrac{-5}{9}+dfrac{3}{5}right).dfrac{3}{10};left(dfrac{3}{9}-dfrac{2}{5}right).dfrac{-3}{10}Câu 4: left(dfrac{3}{7}+dfrac{1}{3}right).left(dfrac{1}{8}-dfrac{1}{2}right);left(dfrac{-9}{12}-dfrac{16}{30}right).left(dfrac{-18}{22}-dfrac{6}{11}right)Càn gấp
Đọc tiếp
Câu 1 :\(\dfrac{-5}{7}.\dfrac{7}{-45}\);\(\dfrac{-3}{10}.\left(-30\right)\);\(-12.\dfrac{-2}{36}\)
Câu 2: \(\dfrac{3}{4}+\dfrac{1}{8}.\dfrac{-16}{5};\dfrac{7}{15}-\dfrac{18}{21}.\dfrac{7}{9}\)
Câu 3: \(\left(\dfrac{-5}{9}+\dfrac{3}{5}\right).\dfrac{3}{10};\left(\dfrac{3}{9}-\dfrac{2}{5}\right).\dfrac{-3}{10}\)
Câu 4: \(\left(\dfrac{3}{7}+\dfrac{1}{3}\right).\left(\dfrac{1}{8}-\dfrac{1}{2}\right);\left(\dfrac{-9}{12}-\dfrac{16}{30}\right).\left(\dfrac{-18}{22}-\dfrac{6}{11}\right)\)
Càn gấp