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\(32\times27+47\times73+27\times15\)
\(=\left(32\times27+27\times15\right)+47\times73\)
\(=27\times\left(32+15\right)+47\times73\)
\(=27\times47+47\times73\)
\(=47\times\left(27+73\right)\)
\(=47\times100\)
\(=4700\)
Học tốt
\(=32\cdot27+27\cdot15+47\cdot73\)
\(=27\cdot\left(32+15\right)+47\cdot73\)
\(=27\cdot47+47\cdot73\)
\(=47\cdot\left(27+73\right)\)
\(=47\cdot100\)
\(=4700\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`16/27xx13/29+16/27xx14/29`
`=16/27xx(13/29+14/29)`
`=16/27xx27/29`
`=16/29`
`48/49+15/39-18/49+15/39`
`=(48/49-18/49)+(15/39+15/39)`
`=30/49+30/39`
`=880/637`
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
X : 27 = 15 ( dư 14 )
X = 15 x 27 + 14
X = 405 + 14
X = 419
x:27=15(dư14)
x:27=27x15
x:27=405
x=405+14
x=419
Bui Thi Mai Huong
k mik nha!
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\(x\div15+x+27+53=201\)
\(x\div15+x+27=201-53\)
\(x\div15+x+27=148\)
\(x\div15+x=148-27\)
\(x\div15+x=121\)
x : 16 = 121 => x = 121 x 16 = 1936
\(x\div\left(15+1\right)=121\)
![](https://rs.olm.vn/images/avt/0.png?1311)
21 x 23 x 25 x 27 - 11 x 13 x 15 x 17
=(21-11)x(23-13)x(25-15)x(27-17)
=10x10x10x10
=10000
\(\text{21 x 23 x 25 x 27 - 11 x 13 x 15 x 17}\)
\(=\)\(483.675-143.\)\(255\)
\(=\)\(326025\)\(-\)\(36465\)
\(=\)\(289560\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(36 × 27) : 3 = 36 × (27 : 3)
= 36 × 9
= 324
--------
(125 × 15) : 5
= 125 × (15 : 5)
= 125 × 3
= 375
--------
(15 × 12) : 9
= (5 × 3 × 12) : 9
= 5 × (36 : 9)
= 5 × 4
= 20
--------
450 : (3 × 5)
= 450 : 15
= 30
--------
(45 × 63) : 9
= 45 × (63 : 9)
= 45 × 7
= 40 × 7 + 5 × 7
= 280 + 35
= 315
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`15xx 27-15 xx 27`
`=15xx(27-27)`
`=15xx0`
`=0`
=(15-15)x27
= 0x 27
=0