(35-815)-(795-65)
= - 780 - 730
= -1510
\(\left(35-815\right)-\left(795-65\right)\)
\(=-150-730\)
\(=-880\)
( 35 -815 ) - ( 795 - 65 )
= -780 - 730
= -1510
(35-815)-(795-65)
= - 780 - 730
= -1510
\(\left(35-815\right)-\left(795-65\right)\)
\(=-150-730\)
\(=-880\)
( 35 -815 ) - ( 795 - 65 )
= -780 - 730
= -1510
a,(8576 - 535) - 8576
b, (-7165) - (155 - 7165)
c, -8715 + (1345 + 8715).
D,(35-815)-(795-65)
Bai 1 : Tinh a) 24 - (-15) - 2 b) (-85) + 10 - (-85) - 50 c) 71 - (-30) - (+18) + (-30)
d) -(30) - (+37) + (+37) + (-85) e) (35-815) - (795-65) g) (2002-79+15) + (-79+15)
h) -(515-80+91) - (2003+80-91)
Bai 2: Tim x,biet a) 25 - (30+x) = x - (27-8) b) (x-12) - 15 = (20-17) - (18+x) c) 15 - x = 7 - (-2) d) x - 35 = (-12) - 3 e) I5-xI - 26 = - 15
quy đồng phân số : 45/35 : 65/75
Giúp mình nha!
Tính mhanh:
815+[95+(-815)+(-45)]
Tính tổng
34+35+36+...+65+66
Tính nhanh :
35 . 23 .+ 35 . 41 + 64 . 65 =
29 . 87 - 29 . 23 + 64 . 71 =
27 . 121 - 87 . 27 + 73 . 34 =
Ai nhanh mk tick cho
Tìm X biết:
a) 770 : [ ( 20X + 10 ) : X ] = 35
b) 5X + 15 - 2X = 65
Bỏ ngoặc rồi tính :
a, - ( - 15 + 125 - 81 ) - ( - 85 + 75 - 19 + 100 )
b, ( 39 - 48 + 57 ) - ( - 61 + 52 + 157 )
c, ( -25 - 65 + 30 ) - ( 75 - 65 - 170 )
d, - ( - 45 - 135 + 29 ) + ( 55 - 35 - 71 )
\(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{65}+...+\frac{1}{4850}\)