2 câu trả lời
a) 321 + 123 - 23 + 32
= ( 321 + 123 ) - ( 23 + 32 )
= 444 - 55
= 389
b) 345 - 56 + 35
= 345 - ( 56 + 35 )
= 345 - 91
= 254
a) 321 + 123 - 23 + 32
= ( 321 + 123 ) - ( 23 + 32 )
= 444 - 55
= 389
b) 345 - 56 + 35
= 345 - ( 56 + 35 )
= 345 - 91
= 254
