Quy dong cac phan so sau
a)\(\frac{9}{70}\);\(\frac{3}{-20}\);\(\frac{-5}{14}\)
b)\(\frac{10}{42}\);\(\frac{-3}{28}\);\(\frac{55}{-132}\)
Quy đồng mẫu các số
a, \(\frac{17}{320}\)và \(\frac{-9}{80}\)
b, \(\frac{-7}{10}\)và \(\frac{1}{33}\)
c, \(\frac{-5}{14}\),\(\frac{3}{20}\)và \(\frac{9}{70}\)
d, \(\frac{10}{42}\), \(\frac{-3}{28}\)và \(\frac{-55}{132}\)
Quy dong cac phan so sau
a)\(\frac{9}{70}\);\(\frac{3}{-20}\);\(\frac{-15}{14}\)
b)\(\frac{10}{42}\);\(\frac{-3}{28}\);\(\frac{55}{-132}\)
a)\(\left(10\frac{2}{9}\cdot2\frac{3}{5}\right)-6\frac{2}{9}\)
b)\(\frac{6}{7}+\frac{1}{7}\cdot\frac{2}{7}+\frac{1}{7}\cdot\frac{5}{7}\)
c)\(3\cdot136\cdot8+4\cdot14\cdot6-14\cdot150\)
d)\(\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+\frac{1}{30}+\frac{1}{42}+\frac{1}{56}+...+\frac{1}{110}\)
e)\(\frac{2}{3\cdot5}+\frac{2}{5\cdot7}+\frac{2}{7\cdot9}+...+\frac{2}{37\cdot39}\)
Tính nhanh nha
B=\(\frac{1}{1+2}+\frac{1}{1+2+3}+\frac{1}{1+2+3+4}+...+\frac{1}{1+2+3+...+10}\)
C=\(\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+\frac{19}{20}+\frac{29}{30}+\frac{41}{42}+\frac{55}{56}+\frac{71}{72}+\frac{89}{90}\)
a) \(\frac{14}{21}+1-|\frac{1}{3}-1|\)
b) \(\frac{1}{3}-|\frac{-1}{4}+\frac{5}{6}|-|\frac{-7}{12}|\)
c) \(|\frac{-5}{6}+\frac{1}{2}|-\frac{1}{3}+|\frac{-5}{12}|\)
d) \(\frac{-10}{6}-\frac{4}{-8}|\frac{-3}{4}+\frac{5}{-2}|\)
e) \(|\frac{-5}{2}|-|\frac{-4}{28}+1|-\frac{-3}{14}\)
g) \(\frac{5}{7}-|\frac{-4}{28}+\frac{1}{2}|-|\frac{-3}{14}|\)
Các bạn giúp mik bài này nhé. Càm ơn nhiều
1. TÍNH
Q=\(\frac{3}{4}.\frac{15}{16}.\frac{24}{25}...\frac{2499}{2500}\)
P=\(\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+\frac{19}{20}+\frac{29}{30}+\frac{41}{42}+\frac{55}{56}+\frac{71}{72}+\frac{89}{90}\)
A=\(\frac{16}{9}.\frac{27}{20}.\frac{40}{33}.\frac{55}{48}...\frac{2016}{2009}\)
giải nhanh hộ mình cái
Tính giá trị biểu thức sau:
1/ \(\frac{9.5^{20}.27^9-3.9^{15}.25^9}{7.3^{29}.125^6-3.3^9.15^{19}}\).
2/ \(\frac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^6}{5.2^{28}.3^{19}-7.2^{29}.3^{18}}\)
3/ \(\frac{2^{12}.13+2^{12}.65}{2^{10}.104}+\frac{3^{10}.11+3^{10}.5}{3^9.2^4}\)
4/ \(\frac{5.4^{15}-9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
5/ \(\frac{13.4^6.\left(28\frac{7}{13}-27\frac{5}{18}\right)}{59.2^{12}\left(\frac{5}{14}+\frac{5}{84}+\frac{5}{204}+\frac{5}{374}\right)}\)
Tặng người giải mỗi ngày ba điểm hđ :)
bài 1 : tính
1) \(\left(\frac{9}{10}-\frac{15}{16}\right).\left(\frac{5}{12}+\frac{11}{15}-\frac{7}{20}\right)\) 2) \(\frac{-3}{5}+\frac{28}{5}.\left(\frac{43}{56}+\frac{5}{24}-\frac{21}{63}\right)\)
3) \(\frac{17}{5}.\frac{-31}{125}.\frac{1}{2}.\frac{10}{17}.\frac{-1}{2^3}\) 4) \(\left(\frac{11}{4}.\frac{-5}{9}-\frac{4}{9}.\frac{11}{4}\right).\frac{8}{33}\)