Bài 1 : Tính : \(\frac{5.6^{13}.2^3+4^8.9^6}{6.2^{15}.3^{12}}\)
Những câu hỏi liên quan
Bài 1 : Tính :
a, 12 : { 350 : [ 500 - ( 125 + 35 . 7 ) ] }
b, 100 : { 250 : [ 450 - ( 4 . \(5^2\). \(2^2\). 25 ) ] }
c, \(\frac{5.6^{13}.2^3+4^8.9^6}{6.2^{15}.3^{12}}\)
Bài 1 : Tính :
a, 12 : { 350 : [ 500 - ( 125 + 35 . 7 ) ] }
b, 100 : { 250 : [ 450 - ( 4. \(5^2\)- \(2^2\). 25 ) ] }
c, \(\frac{5.6^{13}.2^3+4^8.9^6}{6.2^{15}.3^{12}}\)
tính;C=\(\frac{7}{3.4}-\frac{9}{4.5}+\frac{11}{5.6}-\frac{13}{6.7}+\frac{15}{7.8}-\frac{17}{8.9}+\frac{19}{9.10}\)
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bài 1:tính số hạng có trong các tổng sau:
1.1-2+3-4+5-6+7-8
2.1-3+5-7+9-11+13-15
3.-1+3-5+7-9+11-13+15
4.2-4+6-8+10-12+14-16+18-20
5.-2+4-6+8-10+12-14+16-18+20
6.2-5+8-11+14-17+20-23+26
7.-1+5-9+13-17+21-25+29-33+37
8.1-5+9-....-81+85-89+93
9.2-4+6-8+....+202-204
10.1-6+11-16+21-....+176-181
Tính nhanh ( hợp lí )
\(\frac{7}{3.4}-\frac{9}{4.5}+\frac{11}{5.6}-\frac{13}{6.7}+\frac{15}{7.8}-\frac{17}{8.9}-\frac{19}{9.10}+\frac{21}{10.11}\)
\(\frac{7}{3.4}-\frac{9}{4.5}+\frac{11}{5.6}-\frac{13}{6.7}+\frac{15}{7.8}-\frac{17}{8.9}-\frac{19}{9.10}+\frac{21}{10.11}\)
\(=\frac{3+4}{3.4}-\frac{4+5}{4.5}+\frac{5+6}{5.6}-\frac{6+7}{6.7}+\frac{7+8}{7.8}-\frac{8+9}{8.9}-\frac{9+10}{9.10}+\frac{10+11}{10.11}\)
\(=\frac{1}{3}+\frac{1}{4}-\frac{1}{4}-\frac{1}{5}+\frac{1}{5}+\frac{1}{6}-\frac{1}{6}-\frac{1}{7}+\frac{1}{7}+\frac{1}{8}-\frac{1}{8}-\frac{1}{9}+\frac{1}{9}+\frac{1}{10}-\frac{1}{10}-\frac{1}{11}\)
\(=\frac{1}{3}-\frac{1}{11}=\frac{8}{33}\)
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Tính :
A=\(\frac{7}{3.4}\)-\(\frac{9}{4.5}\)+\(\frac{11}{5.6}-\frac{13}{6.7}+\frac{15}{7.8}-\frac{17}{8.9}+\frac{19}{9.10}\)
bạn tìm 1 số để nhân cả tử cả mẫu ra để tử ra 1 so chung nha rồi tách thôi
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Bài 4: Tính nhanh:a, A left(frac{84}{13}right)^2+left(frac{35}{13}right)^2 b, B frac{12-frac{12}{7}-frac{12}{289}-frac{12}{85}}{4-frac{4}{7}-frac{4}{289}-frac{4}{85}}divfrac{3+frac{3}{13}+frac{3}{169}+frac{3}{91}}{7+frac{7}{13}+frac{7}{169}+frac{7}{91}}c, C frac{1times2+2times4+3times6+4times8+5times10}{3times4+6times8+9times12+12times16+15times20}
Đọc tiếp
Bài 4: Tính nhanh:
a, A =\(\left(\frac{84}{13}\right)^2+\left(\frac{35}{13}\right)^2\)
b, B = \(\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}\div\frac{3+\frac{3}{13}+\frac{3}{169}+\frac{3}{91}}{7+\frac{7}{13}+\frac{7}{169}+\frac{7}{91}}\)
c, C =\(\frac{1\times2+2\times4+3\times6+4\times8+5\times10}{3\times4+6\times8+9\times12+12\times16+15\times20}\)
bài 1 : Nfrac{1}{3}+frac{1}{4}+frac{1}{5}+frac{2}{7}+frac{2}{9}+frac{2}{11}Chứng minh rằng N không phải số nguyênBài 2: Tính Afrac{7}{3.4}-frac{9}{4.5}+frac{11}{5.6}-frac{13}{6.7}+frac{15}{7.8}-frac{17}{8.9}+frac{19}{9.10}
Đọc tiếp
bài 1 : N=\(\frac{1}{3}\)+\(\frac{1}{4}\)+\(\frac{1}{5}\)+\(\frac{2}{7}\)+\(\frac{2}{9}\)+\(\frac{2}{11}\)
Chứng minh rằng N không phải số nguyên
Bài 2: Tính A=\(\frac{7}{3.4}\)-\(\frac{9}{4.5}\)+\(\frac{11}{5.6}\)-\(\frac{13}{6.7}\)+\(\frac{15}{7.8}\)-\(\frac{17}{8.9}\)+\(\frac{19}{9.10}\)
RÚT GỌNAfrac{12+frac{12}{7}-frac{12}{25}-frac{12}{71}}{4+frac{4}{7}-frac{4}{25}-frac{4}{71}}:frac{3+frac{3}{13}+frac{3}{15}+frac{3}{15}+frac{3}{101}}{5+frac{5}{13}+frac{5}{15}+frac{5}{101}}Bfrac{frac{1}{51}+frac{1}{52}+frac{1}{53}+......+frac{1}{100}}{frac{1}{1.2}+frac{1}{3.4}+frac{1}{5.6}+.......+frac{1}{99.100}}
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RÚT GỌN
\(A=\frac{12+\frac{12}{7}-\frac{12}{25}-\frac{12}{71}}{4+\frac{4}{7}-\frac{4}{25}-\frac{4}{71}}:\)\(\frac{3+\frac{3}{13}+\frac{3}{15}+\frac{3}{15}+\frac{3}{101}}{5+\frac{5}{13}+\frac{5}{15}+\frac{5}{101}}\)
\(B=\frac{\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+......+\frac{1}{100}}{\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+.......+\frac{1}{99.100}}\)
