tính nhanh: 3457-27x48-48x73+6543
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(3457-27\cdot48-48\cdot73+6543\)
\(=\left(3457+6543\right)-48\left(27+73\right)\)
\(=10000-4800=5200\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
3457 - 27 x 48 - 48 x 73 + 6543
= (3457 + 6543) - (27 x 48 + 48 x 73)
= 10000 - 48 x (27 + 73)
= 10000 - 48 x 100
= 10000 - 4800
= 5200
Ủng hộ mk nha ^_-
![](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
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 10000 - 47 . 72 - 47 . 28
= 10000 - 47 ( 72 - 28 )
= 10000 - 47 . 44
= 10000 - 2068
= 7932
b) 3457 - 27 . 48 - 48 . 73 + 6543
= 3457 - 48 ( - 27 - 48 ) + 6543
= 3457 - 48 . ( - 75 ) + 6543
= 3457 - ( - 27 ) + 6543
= 3457 + 27 + 6543
= 10027
a, 10000-47×72-47×28
= 10000-47(72+28)
=10000-47×100
=10000-4700= 5300
![](https://rs.olm.vn/images/avt/0.png?1311)
a/ 1000 - 47 x 72 - 47 x 28
= 1000 - 47 x (72 + 28)
= 1000 - 47 x 100
= 1000 - 4700
= -3700
b/ 3457 - 27 x 48 - 48 x 73 + 6543
= 3457 - 48 x (27 + 73) + 6543
= (3457 + 6543) - 48 x 100
= 10000 - 4800
= 5200
k mk nha, mk trả lời đầu tiên đấy
![](https://rs.olm.vn/images/avt/0.png?1311)
`3457 - 27 xx 8 - 8 xx 73 + 6543`
`= 3457 + 6543 - 27 xx 8 - 8 xx 73`
`=(3457 + 6543) - (27 xx 8 + 8 xx 73)`
`= 10000 - 8xx (27+73)`
`= 10000 - 8 xx 100`
`= 10000 - 800`
`= 9200`
![](https://rs.olm.vn/images/avt/0.png?1311)
Tính nhanh:
a) 0,125 + 21,075 + 88,36 + 9,875 + 78,925 + 11,64
= \((0,125+9,875)+(21,075+78,925)+(88,36+11,64)\)
= \(10+100+100\)
= \(210\)
b) 3457 - 27 . 48 - 48 . 73 + 6543
= \((3457 +6543) - (27 . 48 + 48 . 73)\)
\(= 10000 - 48 . (27 + 73) \)
\(= 10000-48.100\)
\(= 10000 - 4800\)
\(= 5200\)
c) (792,81. 0,25 + 792,81 0,75). (11. 9 – 900 . 0,1 - 9)
= [ 792,81 . ( 0,25 + 0,75 ) ] . ( 99 - 90 - 9 )
= [ 792,81 . 1 ] . ( 9 - 9)
= 792,81 . 0
= 0
\(=\left(3457+6543\right)-48x\left(27+73\right)\)
\(=10000-4800=5200\)
#quankun^^
Trả lời:
\(3457-27\times48-48\times73+6543\)
\(=3457+6543-[48\times\left(27+73\right)]\)
\(=10000-48\times100\)
\(=10000-4800\)
\(=5200\)
Hok tốt!
Vuong Dong Yet