1 nha

chúc bạn học tốt

click cho mình xin 1 điểm hỏi đáp

ok

\(\frac{1}{2}\)x \(\frac{9}{10}\)+ \(\frac{8}{10}\)+ \(\frac{2}{4}\)+ \(\frac{3}{10}\)x \(0,5\)

= \(0,5\)x \(0,9\)+ \(0,8\)+ \(0,5\)x \(0,5\)

\(=0,45\)x \(1,3\)x \(0,5\)

\(=0,45\)x \(0,65=0,2925\)

= 1,65 x 32,7 + 1,65 x 67,4 - 1,65 x 0,1 

= 1,65 x ( 32,7 + 67,4 - 0,1) 

= 1,65 x 100 

= 165

Ta có: \(9,6\times327+2,4\times315:0,25+4,8\times358:\text{0,5}\)

\(=9,6\times327+9,6\times315+9,6\times358\)

\(=9,6\times\left(327+315+358\right)=9,6\times1000=9600\)

Ta có : \(\frac{\left(11,2-10-1,2\right)x\left(3,75-0,75\right)}{2011+3014}=\frac{0x3}{2011+3014}=\frac{0}{2011+3014}=0\)

\(\Rightarrow\left(2000\times7,5+2012:3\right)\times\left(21-3,5\times0,25\right)\times\frac{\left(11,2-10-1,2\right)\times\left(3,75-0,75\right)}{2011+3014}\)

\(=\left(2000\times7,5+2012:3\right)\times\left(21-3,5\times0,25\right)\times0\)

\(=0\)

toán lớp 5 khó thế bạn

5/13 x 11/19 + 11/19 x 21/13

=11/19 x ( 5/13 + 21/13 )

=11/19 x 26/13

=11/19 x 2

=22/19

Đáp số : \(\frac{1}{5}\)

Tk mk mk tk lại ! ^^ 

= 1/2 x 2/3 x 3/4 x4/5

= 1x2x3x4/ 2x3x4x5 

=1/5

TL:

=69,78 x (75% + 1/4 + 99)

=69,78 x (3/4 + 1/4 + 99)

= 69,78 x (1 + 99)

= 69,78 x 100

= 6978

HT

6978 nha

\(\frac{24}{75}\): \(\frac{8}{15}\)X \(\frac{10}{9}\) = \(\frac{24}{75}\) X \(\frac{15}{8}\)X \(\frac{10}{9}\)= \(\frac{8x3x5x3x5x2}{15x5x8x3x3}\)= \(\frac{2}{3}\)

mình trả lời nhanh nhất nha, nhớ tk cho mình đấy

2/3 nha bn, bn k đi r mk kb cho

\(=\frac{4}{11}\times\left(\frac{5}{13}+\frac{8}{13}\right)\)

\(=\frac{4}{11}\times1\)

\(=\frac{4}{11}\)

Chúc cậu học tốt

\(=\frac{4}{11}\times\left(\frac{5}{13}+\frac{8}{13}\right)\)

\(=\frac{4}{11}\times1\)

\(=\frac{4}{11}\)