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thuch hien cac phep tinh sau
a)-3/8:-9/16-7/6
b)75%-7/4+1,25 .2/5
c) 1,4 .15/49-( 4/5-2/3):11/5
d)(-1/2)-(15,4-39/5).25%
Thuc hien cac phep tinh sau một cách hợp lí:
a) (10^2 + 11^2 + 12^2) : (13^2 + 14^2)
b) 1.2.3...9-1.2.3...8-1.2.3...7.8^2
c) (3.4.2^16)^2/11.2^13.4^11-16^9
d) 1152 - (374 + 1152) +(-65 + 374)
e) 13-12+11+10-9+8-7-6+5-4+3+2-1
thuc hien phep tinh
( 5*4^15*9-4*3^20*8^9) /( 5*2^9*6^19-7*2^29*27^6)
Thuc hien phep tinh
a) \(\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{4}{-9}+\frac{7}{15}\)
b) \(\left(3\frac{2}{5}+2\frac{3}{4}\right)-4\frac{2}{5}\)
a)\(2\dfrac{3}{3}.4.\left(-0,4\right)+1\dfrac{3}{5}.1,75+\left(-7,2\right):\dfrac{9}{11}\)
b)\(\left(\dfrac{1}{24}-\dfrac{5}{16}\right):\dfrac{-3}{8}+1^{10}.\left(-5\right)^0\)
Thuc hien phep tinh:
a) 32.(-1/2)3+1/4
b) 16.(1/2)2.1/2
c) 17/22+4/25+29/25+0,5+5/22
d) 3/11-7/15+8/11-8/15+0.25
Cac ban ghi cac buoc lam gjum mik nha
( 2/3 + -3/4 ) mũ 2 : 5/3 + ( -3/2 ) mũ 3
14 và 3/20 - (5 và 3/20 - 11va 13/19
- 3/8 nhân 7/9 + -3/8 nhân 11/9 + 1va3/8
( 1,7 - 1/5 ) nhân ( 1/6+1/2 ) + ( - 2/5 )
Tính
a) (-1/5 + 5/8) + -3/8
b) -5/21 - (16/21 - 1)
c)3/7 . -5/11 + 3/7 . 6/11
d) 4/3 : -3/8 + 8/-3 . -7/3
e) 3 2/5 + -5/8 - ( 0,4 + 3/8)
Tính hợp lý:
a) ( -5/6 + 2/5) : 3/8 + ( 4/5 - 11/30) : 3/8
b) (-3/4 + 2/5) : 3/7 + ( 3/5 + -1/4) : 3/7
c)-13/18 . 5/8 + -5/18 . 2/9 + -13/18 . 3/8 + -5/18 . 7/9
d) -11/19 . 4/9 + -8/19 . 3/7 + -11/19 . 5/9 + -9/19 . 4/7