c ) 5 - 197 - 2015 - 2015
= 5 - 2015 - 2015 - 197
= - 2010 - 2015 - 197
= - 4025 - 197
= 4222
e) 2004 - 15 + 54 - 2004 - 54
= ( 2004 - 2004 ) - 15 + ( 54 - 54 )
= 0 - 15 + 0
= -15
f) -45789 - 357 - 45789 + 57
= -45789 - 45789 + ( - 357 + 57 )
= -91578 - 300
= -91878
d) 4567 = 1234 - 4567 - ( - 66 ) ( Sai đề nha bạn )
Mik sửa hộ bạn nhé
↓
d) 4567 - 1234 - 4567 - ( - 66 )
= ( 4567 - 4567 ) - ( 1234 + 66 )
= 0 - 1300
= -1300
Xin hay nhất ạ :)