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48 x 27 + 48 + 96 x 36
= 48 x (27 + 1) + 48 x 72
= 48 x 28 + 48 x 72
= 48 x (28 + 72)
= 48 x 100
= 4800 .
![](https://rs.olm.vn/images/avt/0.png?1311)
A = \(\dfrac{8\times12\times32+4\times27\times24+96\times41}{16\times48-48\times9+4\times3\times12}\)
A = \(\dfrac{96\times32+96\times27+96\times41}{16\times48-48\times9+48\times3}\)
A = \(\dfrac{96\times\left(32+27+41\right)}{48\times\left(16-9+3\right)}\)
A = \(\dfrac{96\times100}{48\times10}\)
A = \(\dfrac{20}{1}\) \(\times\) \(\dfrac{48\times10}{48\times10}\)
A = 20
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1
so dau o thung be la
(208 - 60):2=74(lit)
so dau o thung lon la
208 - 74 = 134(lit)
2
48 x 27 + 48 + 96 x 36
=48 x 27 + 48 + 48 x 2 x 36
=48 x (27 + 1 + 72)
= 48 x 100 = 4800
![](https://rs.olm.vn/images/avt/0.png?1311)
48 x X - 96 = 4800
48 x X = 4800 + 96 = 4896
X = 4896 : 48 = 102
![](https://rs.olm.vn/images/avt/0.png?1311)
phải gọn thành phân số tối giản bằng cách thuận tiện nhất nhé các bạn , mình viết thiếu đấy
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`3/7+2/5+4/7`
`=(3/7+4/7)+2/5`
`=1+2/5`
`=5/5+2/5`
`=7/5`
`20/34+4/9+7/17`
`=(20/34+7/17)+4/9`
`=(20/34+14/34)+4/9`
`=34/34+4/9`
`=1+4/9`
`=9/9+4/9`
`=13/9`
`48xx2+96+48xx6`
`=48xx2+48xx2+48xx6`
`=48xx(2+2+6)`
`=48xx10`
`=480`
câu thứ hai thì làm như này em nhé:
\(\dfrac{20}{34}\) + \(\dfrac{4}{9}\) + \(\dfrac{7}{17}\)
= (\(\dfrac{20}{34}\) + \(\dfrac{7}{17}\)) + \(\dfrac{4}{9}\)
= (\(\dfrac{10}{17}\) + \(\dfrac{7}{17}\)) + \(\dfrac{4}{9}\)
= 1 + \(\dfrac{4}{9}\)
= \(\dfrac{13}{9}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
A = 3457 - 27\(\times\) 48 - 48 \(\times\) 73 + 6543
A =(3457 + 6543) - ( 27 \(\times\) 48 + 48 \(\times\) 73)
A = 10 000 - 48 \(\times\) ( 27 + 73)
A = 10 000 - 48 \(\times\) 100
A = 100 \(\times\) ( 100 - 48)
A = 100 \(\times\) 52
A = 5200
![](https://rs.olm.vn/images/avt/0.png?1311)
1000 - 47 . 72 - 47 .28
= 47 . ( 1000 - 72 -28 )
= 47 .0
=0
3457 - 27 . 48 - 48 .73 + 6543
=3457 - 48 . (27 + 73 ) + 6543
= 3457 - 4800 + 6543
= 5200
=4800
= 48 x (27 + 1) + 48 x 72
= 48 x 28 + 48 x 72
= 48 x (28 + 72)
= 48 x 100 = 4800