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36 x 532 + 36 x 532 + 532
= ( 36 x 532 ) x 2 + 532
= 38304 + 532
= 38836
36 x 532 + 36 x 532 + 532
= 532 x (36 + 36 +1)
= 532 x 73
= 38836
\(x+\frac{5}{13}+\frac{10}{26}+\frac{15}{39}+\frac{20}{52}+\frac{401}{104}=\frac{25}{13}.\)
\(\Rightarrow x+\left(\frac{5}{13}+\frac{10}{26}+\frac{15}{39}+\frac{20}{52}+\frac{40}{104}\right)=\frac{25}{13}\)
\(\Rightarrow x+\frac{25}{13}=\frac{25}{13}\)
\(\Rightarrow x=\frac{25}{13}-\frac{25}{13}\)
\(\Rightarrow x=0\)
\(\leftrightarrow k-nha!!!!\)
\(x+\frac{5}{13}+\frac{10}{26}+\frac{15}{39}+\frac{20}{52}+\frac{40}{104}=\frac{25}{13}\) \(x+\left(\frac{5}{13}+\frac{10}{26}+\frac{15}{39}+\frac{20}{52}+\frac{40}{104}\right)=\frac{25}{13}\) \(x+\frac{25}{13}\) \(=\frac{25}{13}\) \(x\) \(=\frac{25}{13}-\frac{25}{13}\) \(x=0\)
( 25 x 36 ) : 9 + 450 - 75 - 25
= 900 : 9 + 450 - 75 - 25
= 100 + 450 - 75 - 25
= 100 + ( 450 - 75 - 25 )
= 100 + 350
= 450
Vậy : ( 25 x 36 ) : 9 + 450 - 75 - 25 = 450
a,\(60\times\left(\frac{7}{12}+\frac{4}{15}\right)\)\(=\frac{60\times7}{12}+\frac{60\times4}{15}\)
\(=\frac{12\times5\times7}{12}+\frac{15\times4\times4}{15}\)
\(=5\times7+4\times4\)
\(=35+16\)
\(=51\)
b, \(\frac{1}{2}\times\frac{2}{3}\times\frac{3}{4}\times...\times\frac{8}{9}\)\(=\frac{1\times2\times3\times4\times5\times6\times7\times8}{2\times3\times4\times5\times6\times7\times8\times9}\)
\(=\frac{1}{9}\)
5/11.5/7+2/7.5/11
=5/11.(5/7+2/7)
=5/11
15 x 7/15 x 4/9
=7 x 4/9
=28/9
45 x 77 + 9 x 22 x 5 + 45
= 45 x 77 + 45 x 22 + 45
= 45 x (77 + 22 + 1)
= 45 x 100
= 4500
k mik nhé
9
ht
ht
cho mình bài giải chi tiết nha bạn:(=