\(-21.27+21.50+\left(-21\right).\left(-127\right)=21.\left(-27+50+127\right)=21.150=3150\)

a, (-27) + |(-127)| - 100

= (-27) + 127 - 100

= [(-27) + 127] - 100

= 100 - 100

= 0

Phần b và c làm tương tự.

-27+l-127l-100

-27+127-100

=0

-17+125+(-8)+1913

=2013

113-[2^4-(4^2+887)]

=113-[2^4-(16+887)]

113-[2^4-903]

113-[16-903]

113-(-887)

=1000

a) 6 x 3² - 24 : 2³

= 6 x 9 - 24 : 8

= 54 - 3

= 51

b) 127 - ( 130 - 27 : 2³ )

= 127 - ( 130 - 27 : 8 )

= 127 - ( 130 - 3.375 )

= 127 - 130 + 3.375

= -3 + 3.375

= 0.357

a) 6 . 3² - 24 : 2³

= 6 . 9 - 24 : 8

= 54 - 3

= 51

Chịu

Em mới lớp 4 hoi

a: (-127)+|-27|+(-7)

=-127+27-7

=-100-7=-107

b: \(125\cdot25\cdot8\cdot4\cdot2^0=125\cdot8\cdot25\cdot4\)

\(=100\cdot1000=100000\)

c: \(5\cdot\left(27-17\right)^2-6^{11}:6^9\)

\(=5\cdot10^2-6^2=5\cdot100-36\)

=500-36

=464

d: \(46\cdot37+93\cdot46+54\cdot61+69\cdot54\)

\(=46\left(37+93\right)+54\left(61+69\right)\)

\(=46\cdot130+54\cdot130=100\cdot130=13000\)

\(166.\left(-127+234\right)-234.\left(166+127\right)\)

\(=\)\(166.107-234.293\)

\(=\)\(17762-68562\)

\(=\)\(-50800\)

\(53.39+47.39-53.21-47.21\)

\(=\)\(39.\left(53+47\right)-21.\left(53+47\right)\)

\(=\)\(39.100-21.100\)

\(=\)\(100.\left(39-21\right)\)

\(=\)\(100.18\)

\(=\)\(1800\)

-(127+38-21)-(121-27+48)+50

=-127-38+21-121+27-48+50

=(-127+27)-(38+48)+(21-121)+50

=-100-86-100+50

=-(100+100+86)+50

=-286+50

=-236

-39+(193-127+96)-(193+196-127)

=-39+193-127+96-193-196+127

=-39+(193-193)-(127+127)+(96-196)

=-39-100

=-139

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