a) = ( -24 + -8) + 36 -7 = ( -32) +36 - 7 = 4-7=-3
b) = 182 - 71 + 58 + 171 - 82= ( 182 - 82 ) + ( -71 + 171) + 58 = 100 +100+58=258
c) = 5612 + 44 - 158 - 612 - 344 + 58 = ( 5612 - 612) + (44 - 344)+ ( -158 + 58) = 5000 + ( - 300) + ( - 100) = 4600
d) = ( -8 . -125 ) . 7 . ( - 9) = -1000 .7 . ( - 9) = 63000
e) = -72 . ( 39 + 11) = - 72.50 = - 3600
~ chúc bn học toots~ # Q.Trang #
a) [ ( -24 ) + ( -8 ) ] + ( -6 )2 - 7
=-32 + 36 - 7
= 4 - 7
= -3
b) ( 182 - 71 + 58 ) + ( 171 - 82 )
=182 - 71 + 58 + 171 - 82
=(182-82) + (-71+171) + 58
=100 + 100 + 58
=200 + 58
=258
c) ( 5612 + 44 - 158 ) - ( 612 + 344 - 58 )
=5612 + 44 - 158 - 612 - 344 + 58
=(5612-621) + ( 44-344) + (-158+58)
=5000 + (-300) + (-100)
=-4700 + (-100)
=-4800
d) ( -8 ) . 7 . ( -125 ) . ( -9 )
=[-8 . (-125)] . [ 7 . (-9)]
=1000.(-63)
=-63000
e) 72 . ( -39 ) + 11 . ( -72 )
=72 . (-39) - 11 . 72
=72 . (-39 - 72)
=72 . (-111)
=-7992
tui sai phần d ròi.
Sửa lại = -63000
# Q.Trang#
a) [ ( -24 ) + ( -8 ) ] + ( -6 )2 - 7 b) ( 182 - 71 + 58 ) + ( 171 - 82 )
= ( -32 ) + ( -6 )2 - 7 = 182 - 71 + 58 + 171 - 82
= ( -32 ) + ( -6 ) . ( -6 ) - 7 = ( 182 - 82 ) + ( 171 - 71 ) + 58
= ( -32 ) + 36 - 7 = 100 + 100 + 58
= 4 - 7 = 200 + 58
= -3 = 258
c) ( 5612 + 44 -158 ) - ( 612 + 344 - 58 ) e) ( -8 ) . 7 . ( -125 ) . ( -9 )
= 5612 + 44 - 158 - 612 - 344 + 58 = [ ( -8 ) . ( -125) ] . 7. ( -9 )
= ( 5612 + 612 ) + ( 44 - 344 ) + ( - 158 + 58 ) = 1000 . 7 . ( -9 )
= 5000 + ( -300 ) + ( -100 ) = 1000 . -63
= 5000 + ( -400 ) = -63000
= 4600
e ) 72 . ( -39 ) + 11 . ( -72 )
= ( -2808 ) + ( -792 )
= -3600