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24% + 3/4 + 0,76 + 25% + 10% x 15 + 1/10 x 85
0,24 + 0,75 + 0,76 + 0,25 + 0,1 x 15 + 0,1 x 85
= (0,24 + 0,76) + (0,75 + 0,25) + 0,1 x (15 + 85)
= 1 + 1 + 0,1 x 100
= 1 + 1 + 10
= 2 + 10
= 12
24% + \(\dfrac{3}{4}\) + 0,76 + 25% + 10% x 15 + \(\dfrac{1}{10}\) x 85
0,24 + 0,75 + 0,76 + 0,25 + 0,1 x 15 + 8,5
= (0,24 + 0,76) + (0,75 + 0,25) + (0,1 x 15 + 8,5)
= 1 + 1 + (1,5 + 8,5)
= 2 + 10
= 12

\(\left(24\%+\frac{3}{4}+0,76+25\%\right)\times\left(3\frac{5}{7}+1\frac{8}{28}\right)\)
\(=\left(\frac{6}{25}+\frac{3}{4}+0,76+\frac{1}{4}\right)\times\left(\frac{26}{7}+\frac{36}{28}\right)\)
\(=\left(\frac{6}{25}+1+0,76\right)\times\left(\frac{26}{7}+\frac{36}{28}\right)\)
\(=\left(\frac{6}{25}+1,76\right)\times\left(\frac{26}{7}+\frac{9}{7}\right)\)
\(=5\times\left(\frac{6}{25}+1,76\right)\)
= 5 x 2
= 10

hhgggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg
\(\left(24\%+\dfrac{3}{4}+0,76+25\%\right)\times\left(\dfrac{3}{\dfrac{5}{7}}+\dfrac{1}{\dfrac{8}{28}}\right)\)
\(=\left(0,24 +0,75+0,76+0,25\right)\times\left(4,2+10,5\right)\)
\(=\left[\left(0,24+0,76\right)+\left(0,75+0,25\right)\right]\times\left(4,2+10,5\right)\)
\(=\left[1+1\right]\times\left(4,2+10,5\right)\)
\(=2\times14,7=29,4\)
\(~HT~,#Ng\)

a, \(\frac{12\times3\times4}{24\times25\times26}\)=\(\frac{12\times3\times2\times2}{12\times2\times25\times13\times2}\)=\(\frac{1\times3\times1\times1}{1\times1\times25\times13\times1}\)=\(\frac{3}{25\times13}\)=\(\frac{3}{325}\)
b, \(\frac{5}{8}\)\(\times\)\(\frac{3}{7}\)\(+\)\(\frac{5}{8}\)\(\times\)\(\frac{4}{7}\)= \(\frac{5}{8}\)\(\times\)\((\)\(\frac{3}{7}\)\(+\)\(\frac{4}{7}\)\()\)
= \(\frac{5}{8}\)\(\times\)\(1\)=\(\frac{5}{8}\)

1)
5 phút 25 giây
x
4
20 phút 100 giây
= 21 phút 40 giây
2)
7 + x = 25/3
7 + x =\(\frac{25}{3}\)
x = \(\frac{25}{3}\)- 7
x = \(\frac{4}{3}\)
Bài 2 tui ko chắc là đề đúng nhưng nếu đúng thì kết quả sẽ như vậy
Nếu đúng cho tui 1 lượt thích nha !
1, 5 phút 25 giây=325 giây
=>325 giây x 4 =1300giây
2, 7+x=25/3
X=25/3-7=....

a) 2 x 12 x 43 + 3 x 32 x 8 + 25 x 6 x4
=(2 x12) x43+(3 x8) x32+(6 x4) x25
=24 x43+24 x32+ 24 x25
=24 x(43+32+25)
=24 x100
=2400
b) 78 x 31 + 78 x 24 + 17 x 78 + 28 x 78
=78x(31+24+17+28)
=78x100
=7800
\(24\%+\dfrac{3}{4}+0,76+25\%\\ =0,24+\dfrac{3}{4}+0,76+\dfrac{1}{4}\\ =\left(0,24+0,76\right)+\left(\dfrac{3}{4}+\dfrac{1}{4}\right)\\ =1+1=2\)