Bài này mới đúng nè :

166 * ( – 127 + 234 ) – 234 * ( 166 +127 )

= [166 . (-127) + 166 . 234] - [234 . 166 + 234 . 127]

= 166 . (-127) + 166 . 234 - 234 . 166 - 234 . 127

= 127 . (-166) - 127 . 234

= 127 . (-166 - 234)

= 127 . (-400)

= -50800

= 166 . (-127) + 166 . 234 - 234 . 166 + 234 . 127

= -166 . 127 + 124 . 127

= 127 . (-166 + 124)

= 127 . (-42)

= -5334

166 . ( – 127 + 234 ) – 234 . ( 166 +127 )

= [166 . (-127) + 166 . 234] - [234 . 166 + 234 . 127]

= 166 . (-127) + 166 . 234 - 234 . 166 - 234 . 127

= 127 . (-166) - 127 . 234

= 127 . (-166 - 234)

= 127 . (-400)

= -50800

166.(-127+234)-234.(166+127)

= 166.(-127)+166.234-234.166-234.127

=[166.(-127)-234.127]+(166.234-234.166)

=(-127).(166+234)+0

=(-127).400

=-50800

Trl :

166×(-127+234)-234×(166+127)

=166*(-127)+166*234-234*166+234*127

=[166*234-234*166]+[166*(-127)+234*127]

=[166*(234-234)]+[(-166)*127+234*127]

=(166*0)+[127*(-166+234)]

=0+127*68

=127*68

=8636

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tck cho quỳnh chi rùi nha!

#moon

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

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

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

\(=\)\(-50800\)

\(53.39+47.39-53.21-47.21\)

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

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

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

\(=\)\(100.18\)

\(=\)\(1800\)

a) 166.(-127)+166.234+(-234).166-234.127

  166.(-234+234)+127.(-166-234)

=0+127.(-400)

=-50800

b) 53.39+43.39-53.21-47.21

=39.(53+43)+(-21).(53+47)

=39.96+(-21).100

=-1644

k cho minh

\(\left(-1089-234\right)+\left(1089-166\right)\)

\(=-1089-234+1089-166\)

\(=\left(-1089+1089\right)-\left(234+166\right)\)

\(=0-400\)

\(-400\)

Chúc bạn học tốt~~!!! :3

\(\left(-1089-235\right)+\left(1089-166\right)\)

\(=-1089-234+1089-166\)

\(=\left(-1089+1089\right)-\left(234+166\right)\)

\(=0-400\)

\(=-400\)

CHÚC BẠN HỌC TỐT.

= 873 

=873               

\(=75:\left(12+27+13+1\right)=75:68=\dfrac{75}{68}\)

=75:(12+27+13+1)=75:68=75/68

=75 : (12+27+13+75) = 75 : 127=75 /127