\(C=9\frac{30303}{80808}+4,03+7\frac{303030}{484848}\)
\(=9\frac{3}{8}+4\frac{3}{100}+7\frac{5}{8}\)
\(=\left(9+7\right)+\left(\frac{3}{8}+\frac{5}{8}\right)+4\frac{3}{100}\)
\(=16+1+4\frac{3}{100}\)
\(=21\frac{3}{100}\)
A = 49 8/23 - (5 7/32 + 14 8/23
B =71 36/45 - 43 8/45 - 1 17/57
C = -3/7 × 5/9 + 4/9 × -3/7 + 2 3/7
D = ( 19 5/8 : 7/12 -13 1/4 : 7/12 ) ×4/5
E = 0,7×2 2/3 × 20×20×0,375 × 5/28
F = (9,75 × 21 3/7 + 39/4 × 18 4/7) × 15/78
H = ( 9 3030/808080 + 7 303030/484848 + 4,03
I = 10101× ( 5/111111+5/222222- 4/3×7×11×13×37 )
tính a:
\(\frac{1}{33}\)x (\(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\)
\(\frac{7}{4x.}\left(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\right)=22\)
\(\left(\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}+\frac{1}{128}+\frac{1}{256}\right).x=1\)
tinh nhanh
\(10101\cdot\orbr{\begin{cases}5\\10101\end{cases}}-\frac{5}{20202}+\frac{5}{30303}+\frac{5}{40404}\)
10101 x (\(\frac{5}{10101}\)_ \(\frac{5}{20202}\)+ \(\frac{5}{30303}\)+ \(\frac{5}{40404}\))
Tính nhanh:
A=\(\left(\frac{2}{5}+\frac{2}{9}+\frac{2}{11}\div\frac{7}{5}+\frac{7}{9}+\frac{7}{11}\right)\div\left(\frac{1}{3}-\frac{1}{4}+\frac{1}{5}\div\frac{7}{6}-\frac{7}{8}+\frac{7}{10}\right)\)
1.Tìm y
a) y3 + 3y = 12 x 11
b) 64 x y + 225 = 700 - 75 - 36 x y
2.Tính
a)\(\frac{4343}{7171}+\frac{4343}{7171}+\frac{4343}{7171}+\frac{4343}{7171}\)
b) A = \(\frac{1}{33}\times\left(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\right)\)
\(\frac{7}{9}\chi\frac{8}{5}-\frac{7}{9}\chi\frac{3}{5}\)
Tính nhanh
tính nhanh
A=\(\frac{6}{7}+\frac{1}{7}.\frac{2}{7}+\frac{1}{7}.\frac{5}{7}\)
B=\(\frac{4}{9}.\frac{13}{3}-\frac{4}{3}.\frac{40}{9}\)
