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\(\frac{5}{11}.\frac{7}{25}+\frac{15}{11}.\frac{1}{5}\)
\(=\frac{5}{11}.\frac{7}{25}+\frac{5}{11}.3.\frac{1}{5}\)
\(=\frac{5}{11}.\frac{7}{25}+\frac{5}{11}.\frac{3}{5}\)
\(=\frac{5}{11}\left(\frac{7}{25}+\frac{3}{5}\right)\)
\(=\frac{5}{11}\left(\frac{7}{25}+\frac{15}{25}\right)\)
\(=\frac{5}{11}.\frac{22}{25}=\frac{2}{5}\)
1) \(=\left(\frac{3}{5}+\frac{2}{5}\right).\frac{6}{11}\)
\(=1.\frac{6}{11}\)
\(=\frac{6}{11}\)
2)\(\frac{17}{25}.\left(\frac{11}{19}+\frac{6}{19}+\frac{2}{19}\right)\)
\(=\frac{17}{25}.1\)
\(=\frac{17}{25}\)
35 x 11 + 385 x 45 + 385 x 9 x 6 = 385 + 385 x 45 + 385 x 54 = 385 x (1 + 45 + 54) = 385 x 100 = 38 500
34 x 28 - 34 x 11 - 7 x 34
= 34 x (28 - 11 - 7)
= 34 x 10
= 340
a: \(\frac{5}{11}\times\frac{7}{25}+\frac{15}{11}\times\frac15\)
\(=\frac{7}{11\times5}+\frac{3}{11}=\frac{7+3\times5}{11\times5}=\frac{22}{55}=\frac25\)
b: \(\frac37\times\frac{25}{19}-\frac17\times\frac{18}{19}\)
\(=\frac{75}{7\times19}-\frac{18}{7\times19}=\frac{57}{7\times19}=\frac37\)
=11 x (35 + 42 + 22 + 1)
=11 x 100
=1100
học tốt em nhé
35 x 11+42x11+22x11+11
= (35 + 42 + 22 +11 ) x11 =
= 110 x11
=1210
bằng = 4,950
\(=1100\)
=11.(35+42+22+1)
=11.100
=1100
35 x 11 + 42 x 11 + 22 x 11 + 11
= 11 x ( 35 + 42 + 22 + 1 )
= 11 x 100
= 1100
35×11-70+35
35 x 11+42x11+22x11+11
= (35 + 42 + 22 +11 ) x11 =
= 110 x11
=1210