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`#040911`
`a)`
`27 \times 38 + 62 \times 27 - 27 \times 90`
`= 27 \times (38 + 62 - 90)`
`= 27 \times (100 - 90)`
`= 27 \times 10`
`= 270`
\(27\times38+62\times27-27\times90\)
\(=27\times\left(38+62-90\right)\)
\(=27\times\left(100-90\right)\)
\(=27\times10\)
\(=270\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(56.27+56.35\right):62=56\left(27+35\right):62=56.62:62=56\)
\(\left(56.27+56.35\right):62\)
\(=\left[56.\left(27+35\right)\right]:62\)
\(=56.62:62\)
\(=56.1\)
\(=56\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
2/3 x 4/5 + 4/5 x 8/3 = 4/5 x (2/3 + 8/3) = 4/5 x 10/3 = 8/3
27/32 x 16/9 -27/32 x7/9 + 27/32
= 27/32 x (16/9 - 7/9 + 1 )
=27/32 x 2
=27/16
\(\frac{2}{3}\) x \(\frac{4}{5}\) + \(\frac{4}{5}\) x \(\frac{8}{3}\)
=\(\frac{4}{5}\) x ( \(\frac{2}{3}\) + \(\frac{8}{3}\) )
= \(\frac{4}{5}\) x \(\frac{10}{3}\)
= \(\frac{40}{15}\) = \(\frac{8}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
64x100+50x44
=2200+6400
=8600
1026+2774
=3800
mình làm đúng ko vậy
TL:
= 3800
nhé
K CHO MK NHAAAAAAA
BNNNNNNNNNNNNNNNNNNNNNNNNNN
~~HT~~
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(=27\left(77+15\right)+27\cdot8\)
\(=27\cdot92+27\cdot8=27\cdot100=2700\)
b: \(=75\cdot89+75\cdot9+2\cdot75=75\left(89+9+2\right)=75\cdot100=7500\)
c: \(=0.25\left(42.9-11.7+0.8\right)=0.25\cdot32=8\)
d: 738 phút=12,3 giờ
\(x=27.38+62.27-27.90\)
\(x=27.\left(38+62-90\right)\)
\(x=27.10\)
\(=270\)
x = 27*(38+62-90)
x = 27*10
x = 270