tinh gia tri bieu thuc:
a) 89,42+(21,15+16,471)=..................................................................
(89,42+212,15)+16,471=..................................................................
b) (135,8+69,07)+52,18=....................................................................
135,8+(69,07+52,18)=...................................................................
lam nhanh may bn mik dang can gap
a) = 89,42+37,621 =301,57+16,471
=127,041 = 318,04
b) = 204,87+52,18 =135,8+ 121,25
=257,05 =257,05
K cho mình nhé. Chúc bạn học giỏi
sao ko ai tra loi cho mik vay