a, -234-(123-234)
=-234-123+234
=(-234+234)-123
=0-123
-123
b, -24 . 33+ 40 . 24 +13 . 30 +13 . 46
= 24x(-33+40)+13(30+46)
=24.7+13.76
=98+988
=1086
c, 34 . (-84)+ 17 . (-32)
=34.(-84-16)
=34.-100
=-3400
a, -234-(123-234)
= -234-123+234
= (-234+234)-123
= 0-123
= -123
b, -24 . 33+ 40 . 24 +13 . 30 +13 . 46
= 24 . ( -33 ) + 40 . 24 + 13 . 30 + 13 . 46
= 24 . [ -33 + 40 ] + 13 . [ 30 + 46 ]
= 24 . 7 + 13 . 76
= 168 + 988
= 1156
a,-234-(123-234)
=-234-123+234
=0-123
=-123
b,-24.33+40.24+13.30+13.46
=24.-33+40.24+13(30+46)
=24(-33+40)+13.76
=24.7+13.76
=168+988
=1156
a, -234-(123-234)
<=> - 234 - 123 + 234
<=> - 123
b, -24 . 33+ 40 . 24 +13 . 30 +13 . 46
<=> 24 . ( - 33 + 40 ) + 13. (30 + 46 )
<=> 24 . 7 + 13 . 76
hình như v tự lm nốt nhá
c, Chị đg bận vt lại đề xem nào !!
a, -234-(123-234)
= -234 - 123 + 234
= (-234 + 234 ) - 123
= 0 - 123
= -123
b, -24 . 33+ 40 . 24 +13 . 30 +13 . 46
= 24 . -33 + 40 . 24 + 13 . (30 + 46)
= 24 . ( -33 + 40 ) + 13 . 76
= 24 . 7 + 13 . 76
= 168 + 988
= 1156
c, 34 . (-84)+ 17 . (-32)
= 17 . 2 . (-84) + 17 . (-32)
= 17 . (-168) + 17 . (-32)
= 17 . [ (-168) + (-32) ]
= 17 . (-200)
= -3400
# HOK TỐT #
