\(\dfrac{1}{4}-\dfrac{1}{3}+\dfrac{5}{12}\\ =\dfrac{3}{12}-\dfrac{4}{12}+\dfrac{5}{12}\\ =\dfrac{3-4+5}{12}\\ =\dfrac{4}{12}\\ =\dfrac{1}{3}\)
thuc hien phep tinh bang cach hop li neu co the 30-[50-(9-4)2]+20150
thuc hien phep tinh bang cach hop li neu co the 37x96-86x37+2x23x5-30+4x16x25
cac ban giup toi cau nay voi:
Thuc hien phep tinh(hop ly neu co the):
(10/99+11/199-12/299)x(1/2-1/3+-1/6)
mong cac ban giup minh nhanh voi a. Minh xin cam on
thuc hien cac phep tinh hop ly neu co the
e)(-25).68 +(-34).(-250)
f)(-2)3(-3)2-32. (-4)3
Thuc hien phep tinh (Tinh nhanh neu co the)
18 x [ (3^4 x 24 + 3^4 - 27 x 3^4) - 71 x1^30 ] - 80
CAC BAN GIUP MINH VOI
thuc hien phep tinh( hop ly neu co the):
a) (11+159) . 37+(185-31) :14
b) 3280-(3^2.7^3.49)
thuc hien phep tinh bang cach hop ly(neu co the) a)248:{[(368+232):120-3]+122}+2011 b) -243+(319:314+28:25)
thuc hien phep tinh ( hop li neu co the ) :
a, (-167) - |-24| + 67
b, (-1988 - 432) - (-32 - 1988)
c, 5. (-7) - (-4)2 - | -1010 |
d, 61 - 93 . 61 + (-61) . 8
thuc hien phep tinh(tinh hop li neu co the)
a)-2/3+4/15 b)(87-17).(-65)+(-87).(17-65) 8.5-8.2/16 -2
