\(M=\dfrac{-1}{3}\cdot\dfrac{67}{4}-\dfrac{55}{4}\cdot\dfrac{-1}{3}\)
\(=\dfrac{-1}{3}\left(\dfrac{67}{4}-\dfrac{55}{4}\right)=\dfrac{-1}{3}\cdot3=-1\)
Tính nhanh
\(\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{\dfrac{2}{3}-\dfrac{2}{7}-\dfrac{2}{13}}.\dfrac{\dfrac{3}{4}-\dfrac{3}{16}-\dfrac{3}{64}-\dfrac{3}{264}}{1-\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}}+\dfrac{5}{8}\)
Tính nhanh
\(\frac{\frac{1}{3}-\frac{1}{7}-\frac{1}{13}}{\frac{2}{3}-\frac{2}{7}-\frac{2}{13}}.\frac{\frac{3}{4}-\frac{3}{16}-\frac{3}{64}-\frac{3}{264}}{1-\frac{1}{4}-\frac{1}{16}-\frac{1}{64}}+\frac{5}{8}\)
tính giá trị của biểu thức sau
a, 1/3-1/7-1/7 /2/3-2/7-2/13 ✖3/4-3/16-3/64-3/256 / 1-1/4-1/16-1/64 +5/8
giúp mink vs nha mn
a, \(5\frac{4}{13}.15\frac{3}{41}-5\frac{4}{13}.2\frac{3}{41}\)
b, \(6.(-\frac{1}{3})^2-(\frac{1}{4}:2-\frac{7}{16}.\frac{-4}{21})\)
1. Tính:
B= (1+1/2+1/4+1/8+1/16)/(1-1/2+1/4-1/8+1/16)
2. Tính:
A= 2/(1×3)+2/(3×5)+2/(5×7)+...+2/(99×101)
B= 1/(1×4)+1/(4×7)+1/(7×10)+1/(10×13)+1/(13×16)
- em đaq cần gấp moq m.n giúp.
1) 5/7.37 13/23-51 13/23.5/7
2) -2/3 +1/3+0,5+2 1/2
3)-0,5+2/3+1/2
4) (8+2 1/3-3/5) -(5+0,4)-(3 1/2 -2)
5) (2/9-7/12):3/4+(16/9-5/12):3/4
6) -(2021.0,7+19,75) +0,7- (8-19,75)
7)15/34+7/21+19/34-20/15
8) 2 5/6+1/6:(-5/8)
9) (-2)^2 +2/9. (4/5-2/3)
10) (-1/5+3/7):5/4+(-4/5+4/7):5/4
11) 2022,2021 . 1954,1945+ 2022,2021 . (-1954,1945)
12) -5,2 .72 +69,1 +5,2 . (-28)+(-1,1)
13) (7 -1/2-3/4) : (5-1/4-5/8)
14) (8+ 2 1/3 -3/5) -(5+0,4) -( 3 1/3 - 2)
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !
12+ 3/11-6/13+3.25-5+3/11-4+7/12+√1+9/16
chỗ 12+3/11;5+3/11;4+7/12;1+9/16 là hỗn số nhé!
Tính
1. 6/5 - 1/4 + 4/5 - 3/4
2. 7/9 - 5/12 + 2/9 - 7/12
3. -4/15 + 5/13 - 11/15 + 8/13
4. 9/15 - 7/13 +6/15 - 6/13
5. 12/5 - 3/7 + 3/5 - 4/7
6. 6/5 - 1/4 + 4/5 - 3/4 + 1/2
7. 13/7 - 8/6 + 8/7 - 4/6 - 1/3
