-(-31/32-7/15)+(-15/32-7/15)
=689/480+(-449/480)
=1/2
HT
-(-31/32-7/15)+(-15/32-7/15)
=689/480+(-449/480)
=1/2
HT
Tính tổng S=1/2+3/4+7/8+15/16+31/32+63/64+127/128-6
tinh
(-7/15).5/8. 15/-7.(-32)
giup voi
(-7/15).5/8.15/-7.(-32)
thuc hien phep tinh(1/2+3/4+7/8+15/16+31/32+63/64) -5
ban nao lam duoc minh like cho>,<...........................!!!!!!!
tính giá trị biếu thức A = 14^16 . 21^31 . 35^48 trên 10^16 . 15^32 . 7^96
giải nốt em bài nữa với ạ , tks cực nhìuu
Tính hợp lý
a)-41/-32.(15/8-16/41)+15/8.(41/32-8/3)
b)43/47.(18/37+47/43)-(43/47+37/36)
c)5/7.(1/2-1/3+4/7)+(1/3-1/2-4/7):7/5
A=-5/18+32/45-9/10+(-1/4+7/33-5/33)-(-15/12+6/11+8/15) = ?
Thuc hien phep tinh:
a.3/7.11/15+3/7:15/14+2/7
b.(-7/15).5/8.15/-7(-32)
c.[(1/9:8/27):-1/3]:81/128
d.-66(1/2-1/3+1/11)+124(-37)+63(-124)
\(\left(2.\dfrac{2}{15}.\dfrac{9}{17}.\dfrac{3}{32}\right)\div\left(-\dfrac{3}{7}\right)\)