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Cách 1:
\(\frac{5}{12}:\frac{2}{5}+\frac{7}{12}:\frac{2}{5}-\frac{1}{3}:\frac{2}{5}\)
\(=\frac{5}{12}\times\frac{5}{2}+\frac{7}{12}\times\frac{5}{2}-\frac{1}{3}\times\frac{5}{2}\)
\(=\frac{25}{24}+\frac{35}{24}-\frac{5}{6}\)
\(=\frac{25}{24}+\frac{35}{24}-\frac{20}{24}\)
\(=\frac{5}{3}\)
Cách 2.
\(\frac{5}{12}:\frac{2}{5}+\frac{7}{12}:\frac{2}{5}-\frac{1}{3}:\frac{2}{5}\)
\(=\frac{5}{12}\times\frac{5}{2}+\frac{7}{12}\times\frac{5}{2}-\frac{1}{3}\times\frac{5}{2}\)
\(=\left(\frac{5}{12}+\frac{7}{12}-\frac{1}{3}\right)\times\frac{5}{2}\)
\(=\left(1-\frac{1}{3}\right)\times\frac{5}{2}\)
\(=\left(\frac{3}{3}-\frac{1}{3}\right)\times\frac{5}{2}\)
\(=\frac{2}{3}\times\frac{5}{2}\)
\(=\frac{5}{3}\)
Linz
![](https://rs.olm.vn/images/avt/0.png?1311)
27,135 + \(\frac{71}{100}+\frac{542}{1000}\)
= 27,135 + 0,71 + 0,542
= 27,845 + 0,542
= 28,387
a, = 27135/1000 + 710/1000 + 542/1000 = (27135+710+542)/1000 = 28387/1000 = 28,387
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a) 1,4 : 3 + 5,8 :3 = (1,4+5,8) :3
=6,2 :3
= 18,6
b) ( 1,25 x 3,6 ) : ( 9 x 5) = 4,5 : 45
= 0,1
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(7.5 x 18.3 + 26.4 x 18.3)x(47x11-47x100x0.1-47)
=(7.5x18.3+26.4x18.3)x(47x11-47x10-47)
=(7.5x18.3+26.4x18.3)x47x(11-10-1)
=(7.5x18.3+26.4x18.3)x47x0
=(7.5x18.3+26.3x18.3)x0
=0
Cac ban giup Minh nha.
6954 + 7123 + 9816 - ( 816 - 123 - 954 )
Dang tính nhanh nhe
(6,7 + 2, 3 +5,8):1,2
14,8 : 2
7,4
Bạn cho mình đi
\(C1:\)
\((6,7 + 2,3 + 5,8) : 1,2\)
\(= 14,8 : 1,2\)
\(= \frac {37}{3}\)
\(C2:\)
\((6,7+2,3+5,8) : 1,2 \)
\(= 6,7:1,2 + 2,3:1,2+5,8:1,2\)
\(= \frac {67}{12} + \frac {23}{12} + \frac {29}{6}\)
\(= \frac {37}{3}\)