A) 1243 : {23 . 2 [14 + 23 . (34 - 23) + 12]} - 21 . 2
B) 23 . 25 + 23 . 76 - 23
= 23 . 25 + 23 . 76 - 23 . 1
= 23 . ( 76 + 25 - 1 )
= 23 . 100
= 2300
C) 45 : 5 + 34 . 3
= 9 + 34/3
= 61/3
B ) 23 . 25 + 23 . 76 - 23
23 . ( 25 + 76 )
23 . 101
2323
C ) 45 : 5 + 34 . 3
9 + 102
111
Mình chỉ làm 2 câu thôi phiền cậu lm nốt câu A nhé
k cho mik nha
A) 1243 : {23 . 2 [14 + 23 . (34 - 23) + 12]} - 21 . 2
= 1234 : [ 46 . ( 14 + 23 . 11 + 12 ) ] - 42
= 1234 : [ 46 . ( 14 + 253 + 12 ) ] - 42
= 1234 : ( 46 + 279 + 12 ) - 42
= 1234 : 337 - 42
= 1234/337 - 42
= -12920/337
B) 23 . 25 + 23 . 76 - 23
= 23 . ( 25 + 76 - 1 )
= 23 . 100
= 2300
C) 45 : 5 + 34 . 3
= 9 + 102
= 111
Hok tốt!!!!!!!!!!!!!