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b) 25.(37+5) -63.(-25)+5.(-125)
= 25.42+63.25+5.25.(-5)
= 25.[42+25+5.(-5)]
= 25.[42+25-25]
= 25.42
=1050
c) 31 . (-18)+ 31.(-81)-31
= 31.(-18)+31.(-81)+31.(-1)
= 31.[-18+(-81)+(-1)]
= 31.(-100)
= -3100

A; 2015+37-2016-47
= (2016-2015)+(47-37)
= 1 + 1 =2
B;34+35+36+37-14-15-16-17
= (34-14)+(35-15)+(36-16)+(37-17)
= 20 + 20 + 20 + 20 = 80
C ;-7624 + (1543+7624) bổ ngoặc rồi tính
= -7624 +1543+7624
= (7624+-7624)+1543
= 0 +1543 = 1543
D; (27-514) -(486-73) quy tắc đổi dấu
= 27-514 -486-73
= -27 + -514 + -486 + -73
= (-27+-73)+(-486+-514)
= -100 + -1000 = -1100
=


a,(567-46)-(54+567)
=567-46+54-567
=567.(46+54)
=567.100
=56700

a)=9*3-26
=27-26
=1
b)=125*100-25*100
=12500-2500
=10000

(-17) + 42 +(-183) + 58
=[(-17)+(-183)] + (42+58)
=(-200) + 100
=(-100)
cho mik rùi mik giải tiếp
( -17 ) + 42 + ( -183 ) + 58
= ( -17 ) + ( -183 ) + ( 42 + 58 )
= -200 + 100
= -100
125 ( -21 ) + 21 . 225
= 125 ( -21 ) - ( -21 ) 225
= -21 ( 125 - 225 )
= -21 . ( -100 )
= 2100
37 ( 13 - 5 ) - 13 ( 37 - 5 )
= 37.13 -37.5 - 13.37 - 13.5
= ( 37.13 - 13.37 ) - ( 37.5 + 13.5 )
= 0 - 5 ( 37 + 13 )
= 0 - 5. 50
= -250
25 - 25 \(\orbr{ }\)23 + 7( -59 + 56 ) + \(|\)-12\(|\):( -4 )
25 -25 ( 23 + 7 . -3 ) + 12 : (-4)
25 - 25 . -2 + -3
= 25 -( -50 ) + ( -3 )
= 72

1) $(-35)\cdot18+28\cdot35$
$=35\cdot(-18)+28\cdot35$
$=35\cdot(-18+28)$
$=35\cdot10$
$=350$
2) $53\cdot29-47\cdot(-29)$
$=53\cdot29-47\cdot(-1)\cdot29$
$=53\cdot29+47\cdot29$
$=29\cdot(53+47)$
$=29\cdot100$
$=2900$
3) $125\cdot(-24)+24\cdot225$
$=(-125)\cdot24+24\cdot225$
$=24\cdot(-125+225)$
$=24\cdot100$
$=2400$
4) $26\cdot(-121)-121\cdot(-36)$
$=-121\cdot[26+(-36)]$
$=-121\cdot(26-36)$
$=-121\cdot(-10)$
$=121\cdot10$
$=1210$
5) $65\cdot(-25)+25\cdot(-23)$
$=-65\cdot25+25\cdot(-23)$
$=25\cdot(-65-23)$
$=25\cdot(-88)$
$=-2200$
6) $237\cdot(-26)+26\cdot137$
$=-237\cdot26+26\cdot137$
$=26\cdot(-237+137)$
$=26\cdot(-100)$
$=-2600$
7) $30\cdot(-125)+25\cdot30$
$=30\cdot(-125+25)$
$=30\cdot(-100)$
$=-3000$
8) $(-37)\cdot69+(-31)\cdot37$
$=37\cdot(-69)+37\cdot(-31)$
$=37\cdot(-69-31)$
$=37\cdot(-100)$
$=-3700$
9) $31\cdot72-31\cdot70-31\cdot2$
$=31\cdot(72-70-2)$
$=31\cdot(2-2)$
$=31\cdot0$
$=0$
10) $(-12)\cdot47+(-12)\cdot52+(-12)$
$=-12\cdot(47+52+1)$
$=-12\cdot100$
$=-1200$
$\text{#}Toru$
(-37)+25+(-37)+125
=(-37-37)+(25+125)
=-74+150
=76
`(-37) + 25 + (-37) + 125`
\(\left[\left(-37\right)+\left(-37\right)\right]+\left(25+125\right)\)
\(=0+150=150\)