\(\frac{25}{12}-\frac{20}{63}=\frac{445}{252}\)
\(\frac{9}{50}-\frac{13}{75}=\frac{1}{150}\)
\(\frac{2}{19}-\frac{2}{65}-\frac{4}{39}=\frac{-8}{285}\)
tính chi tiết :
a,\(\frac{25}{42}-\frac{20}{63}\)
b,\(\frac{9}{50}-\frac{13}{75}-\frac{1}{6}\)
c,\(\frac{2}{15}+\frac{-2}{65}-\frac{4}{39}\)
Các bạn lm chi tiết hộ mình vs thank nha ^~^
1) Tính
a)\(\frac{25}{42}\)-\(\frac{20}{63}\)
b)\(\frac{9}{50}\)-\(\frac{13}{75}\)-\(\frac{1}{6}\)
c)\(\frac{2}{15}\)-\(\frac{2}{65}\)-\(\frac{4}{39}\)
2/Tìm x, biết
a) x+\(\frac{7}{12}\)=\(\frac{17}{18}\)-\(\frac{1}{9}\)
b)\(\frac{29}{30}\)-(\(\frac{18}{23}\)+x) =\(\frac{7}{69}\)
\(A=\frac{-7}{25}.\frac{39}{-14}.\frac{50}{78}\)
\(B=\frac{-3}{11}.\frac{-22}{66}.\frac{121}{15}\)
\(C=\frac{3}{7}.\frac{2}{5}.\frac{7}{3}.20.\frac{19}{72}\)
\(D=\frac{6}{7}.\frac{8}{13}+\frac{9}{13}.\frac{6}{7}-\frac{4}{13}.\frac{6}{7}\)
Tính giá trị biểu thức
bài 1 tính
A = \(\frac{25}{54}\)+\(\frac{3}{75}\):\(\frac{\left(\frac{39}{65}+0,415-\frac{33}{600}\right):\frac{21}{9}}{7^2-15,25+13\frac{15}{36}-16\frac{17}{9}}\)
bài 2 tính ti số \(\frac{A}{B}\)biết : \(A=\frac{4}{7.13}+\frac{6}{7.41}+\frac{9}{10.41}++\frac{7}{10.57}\)
\(B=\frac{7}{19.31}+\frac{5}{19.43}+\frac{3}{23.43}+\frac{11}{23.57}\)
A=\(1-\frac{5}{6}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}+\frac{19}{90}-\frac{21}{110}+\frac{23}{132}-\frac{25}{156}\)\(\frac{25}{156}\)
Giups mình nha !!!
tính giá trị:
A=\(\frac{5}{6}-\frac{-1}{12}+\frac{2}{3}-\frac{-2}{7}+\frac{1}{25}-\frac{-1}{4}-\frac{5}{42}\)
B=\(\frac{7.6^{10}.2^{20}.3^6-2^{19}.6^{15}}{9.6^{19}.2^9-4.3^{17}2^{26}}\)
\(\frac{21}{54}+\frac{3}{75}:\frac{\left(\frac{39}{65}+0,415-\frac{33}{600}\right):\frac{21}{9}}{7^2-18,25+13\frac{15}{16}-16\frac{17}{102}}\)
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:thực hiện phép tính :
a)\(\frac{3}{7}+\frac{5}{13}+\frac{4}{13}\)
b)\(\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
c)\(\frac{2}{5}.\frac{1}{3}-\frac{2}{15}:\frac{1}{5}+\frac{3}{5}.\frac{1}{3}\)
d)\(\left(4-\frac{5}{12}\right):2+\frac{5}{24}\)
e)\(\frac{7}{19}.\frac{8}{11}+\frac{3}{11}.\frac{7}{19}+\frac{-1}{19}\)
f)\(\frac{9}{27}+\frac{8}{24}+\frac{18}{27}-\frac{-16}{24}+\frac{2}{3}\)
g)\(\frac{-5}{21}+\frac{-2}{21}+\frac{8}{24}\)
h)\(\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{4}{-9}+\frac{7}{15}\)
i)\(\frac{7}{25}.\frac{39}{-14}.\frac{50}{78}\)
m.n làm nhanh cho mình nhé, chiều mình phải nộp rồi! cảm ơn m.n!
