giúp em với ạ
D) 50/13+10/13 -10 x5/3-2x5/13
Tính thuận tịn nhất ạ
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b,14/13:1/2+3/13*2-2*7/13=14/13*2+3/13*2-2*7/13
=2*(14/13+3/13-7/13)
=2*10/13
=20/13
13/4 + 3/4 x 8= = 13/4 + 6 = 13/4 + 24/4 = 37/4
13/7 - 5 : 10/3= 13/7 - 5 x 3/10 = 13/7 - 3/2 = 26/14 - 21/14 =5/14
\(26\times8+4\times13-10\times26\)
\(=26\times8+2\times2\times13-10\times26\)
\(=26\times8+2\times26-10\times26\)
\(=26\times\left(8+2-10\right)\)
\(=26\times0\)
\(=0\)
#Đang Bận Thở
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vỉ3
jnchhufr 4ujrr bv fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
\(\dfrac{2}{3}+\dfrac{1}{5}.\dfrac{10}{7}=\dfrac{2}{3}+\dfrac{10}{35}=\dfrac{70}{105}+\dfrac{30}{105}=\dfrac{100}{105}=\dfrac{50}{21}\)
a) Ta có: \(\dfrac{2}{3}+\dfrac{1}{5}\cdot\dfrac{10}{7}\)
\(=\dfrac{2}{3}+\dfrac{2}{7}\)
\(=\dfrac{14}{21}+\dfrac{6}{21}\)
\(=\dfrac{20}{21}\)
uses crt;
var s1:real;
i,n,s2,a:integer;
begin
clrscr;
readln(n);
s1:=1;
for i:=1 to n do s1:=s1*i;
writeln(s1:0:0);
s2:=0;
a:=10;
repeat
s2:=s2+a;
a:=a+1;
until s2>=10000;
writeln(s2);
readln;
end.
\(\frac{9}{4}x\frac{13}{10}-\frac{3}{4}x\frac{11}{10}+\frac{3}{4}:\frac{10}{72}\)
\(=\frac{39}{4}x\frac{3}{10}-\frac{11}{4}x\frac{3}{10}+\frac{72}{4}x\frac{3}{10}\)
\(=\frac{3}{10}x\left(\frac{39}{4}-\frac{11}{4}+\frac{72}{4}\right)\)
\(=\frac{3}{10}x25\)
\(=\frac{15}{2}\)
= 3x3/4x13/10-3/4x11/10+3/4x72/10
= 3/4x(3x13/10-11/10+72/10)
= 3/4x10
=30/4
=15/2
mih nha
okiii
\(\dfrac{50}{13}+\dfrac{10}{13}-10\times\dfrac{5}{3}-2\times\dfrac{5}{13}\)
\(=\dfrac{50+10}{13}-\dfrac{50}{3}-\dfrac{10}{13}\)
\(=\dfrac{60}{13}-\dfrac{10}{13}-\dfrac{50}{3}\)
\(=\dfrac{60-10}{13}-\dfrac{50}{3}\)
\(=\dfrac{50}{13}-\dfrac{50}{3}\)
\(=-\dfrac{500}{39}\)
Hừm bài này cj thấy khum tính thuận tiện đc ý:<<
Thank chị nha