ai làm nhanh tui k cho ạ, giúp vs đang cần gấp
-234-(123-234)
= -234-123+234
= 123
\(a,-234-\left(123-234\right)\)
\(=-234-123+234\)
\(=-123\)
\(b,-24.33+40.24+13.30+13.46\)
\(=24\left(-33+40\right)+13\left(30+46\right)\)
\(=24.13+13.76\)
\(=13.\left(24+76\right)\)
\(=13.100=1300\)
\(c,34.\left(-84\right)+17.\left(-32\right)\)
\(=17.2.\left(-84\right)+17.\left(-32\right)\)
\(=17.\left(-168-32\right)\)
\(=17.\left(-200\right)\)
\(=-3400\)
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
c, 34 . (-84)+ 17 . (-32)
= -2856 + ( - 554 )
= -3400
-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 = 1156
