6/7+5/8:5-3/16
= 6/7+1/8-3/16
= 55/56-3/16
= 89/112
6/7+5/8:5-3/16
= 6/7+1/8-3/16
= 55/56-3/16
= 89/112
a) 6/7 : ( 2/5 . 6/7)
b) 6/7 + 5/7 : 5 - 8/9
c) 6/7 + 5/8 . 1/5 - 3/16 . 4
d) -1/6 + 2/3 . -3/4 + 4/5
`6/7:(2/5xx6/7)`
6/7 + 5/7 : 5 - 8/9
6/7 + 5/8 . 1/5 - 3/16 .4
1) 15 - 98 + 91 - 75 + 98 - 91 - 13
2) 5 - ( 4 - 7 + 12 ) + ( 4 - 7 + 12 ) - 10
3) 20 - ( 25 - 98 + 12 ) + ( 25 - 98 - 72 )
4) - ( 17 - 4 + 13 + | -17 | + 13 )
5) | -16 | - ( 5 - 8 + 7) - ( - 5 ) - 8
6) -20 + ( 3 - 16 + 7 ) - ( 3 - 16 + 7 )
7) 32 - ( 5 - 8 + 32 ) + ( 5 - 8 + 6 )
8) -20 - ( 25 - 11 + 8 ) + ( 25 - 8 + 20 )
Tính giá trị biểu thức :
A = 6/8 . 8/13 + 6/13 . 9/7 - 3/13 . 6/7
B = ( 5/4 + 3/4 ) . 4/7 . ( 3/4 + 9/4 ) . 4/7
C = -5/7 . 1/35 + 6/49 . ( -8 ) + 16/(-3) . (-3)/8
D = ( 5/10 + 21/28 - 60/72 ) . 24/5
a)1/3+3/8-7/12
c) 6/7+5/8:5-3/16×(-2)2
Dạng 1. Thực hiện phép tính (tính nhanh nếu có thể)
a) 1/2 + 3/4 - (3/4 - 4-5)
b) (9/16 + 8/-27) - (19/27 - 7/16 - 2)
c) - 5/8 . (4/9 + 7/-12)
d) 7/10 . -3/5 + 7/10 . -2/5 - -3/10
e) -3/7 . 5/9 + 4/9 . -3/7 + 2 3/7
f) 8 2/7 - (3 4/9 + 4 2/7)
h) 3 . (-1/2 )^2 - (4/5 + 8/15) : 5/6
các bạn giúp mình nha!!
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)
a)\(\dfrac{8}{5}\cdot\dfrac{2}{3}+\dfrac{-5\cdot5}{3\cdot5}\)
b) \(\dfrac{6}{7}+\dfrac{5}{8}:5-\dfrac{3}{16}\left(-2\right)^2\)
1/ Tính nhanh:
a. 5/7×5/11+5/11×2/9-5/7×17/11
b. 1×2+2×4+3×6+4×8+5×10/3×4+6×8+9×12+12×16+15×20