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a) \(86+375+14\)
\(=\left(86+14\right)+375\)
\(=100+375\)
\(=475\)
b) \(72+69+128\)
\(=\left(72+128\right)+69\)
\(=200+69\)
\(=269\)
c) \(25\cdot5\cdot4\cdot27\cdot2\)
\(=\left(25\cdot4\right)\cdot\left(5\cdot27\right)\cdot2\)
\(=100\cdot135\cdot20\)
\(=200\cdot135\)
\(=27000\)
d) \(28\cdot64+28\cdot36\)
\(=28\cdot\left(64+36\right)\)
\(=28\cdot100\)
\(=2800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a). 25.5.4.27.2=(25.4).(5.2).27=100.10.27=1000.27=27000
b). 28.64+28.36=28.(64+36)=28.100=2800
![](https://rs.olm.vn/images/avt/0.png?1311)
A, 2 x 26 x 5 =( 5 x 2) x 26
10 x 26
=260
b,4 x 37 x 25 =( 4 x 25) x 26
= 100 x 26
= 3700
c, 25 x 5 x 4 x 27 x 2 =( 25 x 4 ) x ( 2x 5) x 27
= 100 x 10 x 27
= 1000x 27
=27000
d,28 x 64 + 28 x 36 = 28 x ( 64 + 36 )
= 28 x 100
=2800
e, 769 x 85 - 769 x 75 = 769 x ( 85 - 75 )
=769 x 10
=7690
f, 56 x 37 + 56 x 63 = 56 x ( 37 + 63 )
= 56 x 100
=5600
a. = 26 x (2 x 5)
= 26 x 10 =260
b.=( 25x4) x37
=100 x37=3700
c.=(25x4) x(5x2) x27
=100 x10 x27
= 27000
d.=28 x( 64+36)
=28 x100
= 2800
e.=769 x( 85-75)
=769 x10 =7690
f. =56 x(37 +63)
=56 x100
= 5600
![](https://rs.olm.vn/images/avt/0.png?1311)
\(86+357+14=457\)
\(72+69+128=275\)
\(25\cdot5\cdot4\cdot27\cdot2=27000\)
\(28\cdot64+28\cdot36=28\left(64+36\right)=2800\)
a) \(86+357+14=\left(86+14\right)+357=100+357=457\)
b) \(72+69+128=\left(72+128\right)+69=200+69=269\)
c) \(25.5.4.27.2=\left(25.4\right).\left(5.2\right).27=100.10.27=27000\)
d) \(28.64+28.36=28\left(64+36\right)=28.100=2800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a 86+14+357=100+357=457
b 72+128+69=200+69=269
c (25.4).(5.2).4.27
=100.10.4.27
=1000.4.27
=4000.27=64000
d 28. (64+36)=28.100=2800
nha
a) 86 + 357 + 14 b ) 72 + 69 +128
= ( 86 + 14 ) + 357 = ( 72 + 128 ) + 69
= 100 + 357 = 200 + 69 = 269
= 457
c) 25 . 5 . 4 . 27 .2
= ( 25.4).(5.2).27
= 100 x 10 x 27
= 1000 x 27
= 27 000
d) 28.64+28.36
= 28 . ( 64 + 36 )
= 28.100
= 2800
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 86 + 357 + 14 = (86 + 14) + 357 = 457;
b) 72 + 69 + 128 = (72 + 128) + 69 = 269;
c) 25 . 5 . 4 . 27 . 2 = (25 . 4) . ( 5 . 2) . 27 = 100.10.27 = 27 000;
d) 28 . 64 + 28 . 36 = 28.(64 + 36) = 2800
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 86 + 357 + 14
= ( 86 + 14 ) + 357
= 100 + 357
= 457
b) 72 + 69 + 128
= ( 72 + 128 ) + 69
= 200 + 69
= 269
c) 25 . 5 . 4 . 27
= ( 25 . 4 ) . 5 . 27
= 100 . 5 . 27
= 500 . 27
= 13500
d) 28 . 64 + 28 . 36
= 28 . ( 64 + 36 )
= 28 . 100
= 2800
a)
\(86+357+14=\left(86+14\right)+357=100+357=457\)
b)
\(72+69+128=\left(72+128\right)+69=200+69=269\)
c)
\(25.5.4.27.2=\left(25.4\right).\left(5.2\right).27=100.10.27=27000\)
d)
\(28.64+28.36=28.\left(64+36\right)=28.100=2800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
b) 36.28+36.82+64.69+64.41
= 36.(28+82)+64.(69+41)
=36.110+64.110
=(36+64).110
=100.110
=11000.( phần a mk nghĩ sau )
b) = 36 . (28+82) + 64 . (69+41)
= 36 . 110 + 64 . 110
= (36+64) . 110
= 100 . 110
= 11000
25.5.4.27.2=27000
28.64+28.36=2800
mk ne,tick nha.
25.5.4.27.2=(25.4).(5.2).27=100.10.27=1000.27=27000
28.64+28.36=28.(64+36)=28.100=2800