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\(27\times75+27\times25-5^2\cdot6\)
\(=27\cdot75+25\times27-25\times6\)
\(=27\times\left(75+25\right)-150\)
\(=27\times100-150\)
\(=2700-150\)
\(=2550\)
27 . 75 + 25 . 27 - 150
= 27.(75+25)-150
= 27.100-150
= 2700 - 150
= 2550
20 - [ 30 - ( 5 - 1 )2 ]
= 20 -[30-42 ]
= 20 - ( 14 )
= 6
a) 15 . (27 + 18 + 6 ) + 15 . ( 23 +12 ) = 15. 51 + 15 . 35 = 765 + 525 = 1290
b) 14 . 35 . 5 + 10 . 25 . 7 + 20 . 70 = 2450 + 1750 + 1400 = 2452450
c) 53 . ( 51 + 4 ) + 53 . ( 49 + 96 ) + 53 = 53 . 55 + 53 . 145 + 53 = 2915 . 7685 = 22401775
d) 46 . ( 27 +75 ) +8 . ( 58 + 25 ) + 8 . ( 58 + 25 ) . 2 = 46 . 102 + 8 . 83 + 8 . 83 = 4692 + 664 + 664 = 6020
\(a.27.75+25.27-150\)
\(=27.\left(75+25\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
a, 27.75+25.27-150 b,3.52-16:23 d, 60 : {[( 12-3 ).2] +2}
= 27.(75+25)-150 = 3.25-16:4 = 60 : {[ 9.2] + 2
= 27. 100 - 150 = 75 - 4 = 60 : 18 + 2
= 2700 - 150 = 71 = 60 : 20
= 2550 = 3
Tk mik nha
b) 2.2.2.3.3.62.3 = 2.2.2.3.3.6.6.3 = 2.2.2.3.3.3.2.3.2.3 = 25.35
5) 24*(15+49)+12*(50+42)
=24*64+12*92
=24*64+12*2*46
=24*64+24*46
=24*(64+46)
=24*110
=2640
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
a) 27.75+25.27-150
= 27.(75+25)-150
= 27.100-150
= 2550
b) 12:{390:[500-(125+75.7)]}
= 12:{390:(500-25.26)}
= 12:{390:[25.(20-26)]}
= 12:(390:(-150)]}
= 12 : \(\dfrac{-13}{5}\)
= \(\dfrac{-60}{13}\)
a)27.75+25.27-150=27.(75+25)-150=27.100-150=2700-150=26850
b)\(12:\left\{390:\left[500-\left(25.5+25.3.7\right)\right]\right\}\)
\(=12:\left\{390:\left[25.20-25.26\right]\right\}\)
\(=12:\left\{3.10.13:\left[-25.6\right]\right\}\)
\(=12:\left(\dfrac{-13}{5}\right)=-12.\dfrac{5}{13}=\dfrac{-60}{13}\)
27*75+25*27-5^2*6
=27*25*3+25*27-25*6
=25*(27*3+27-6)
=25*102
=2550
27 x 75 + 25 x 27 - 52 x 6
= 27 x 3 x 25 + 25 x 27 - 25 x 6
= 81 x 25 + 25 x 27 - 25 x 6
= 25 x ( 81 + 27 - 6 )
= 25 x 102
= 2550
# HOK TỐT #