3-4+5-x=45-4
3-4+5-x=41
6-x=41
ban oi sai de roi
3 - 4 + 5 - x = 45 - 4
3 - 4 + 5 - x = 41
-1 + 5 - x = 41
4 - x = 41
x = 4 - 41
x = -37
A X + 4/5= 45/5 -( 3/7 + 3/5)
B. 5/7 + X/35 = 4/5
x +4/5=45/4-[7/5+3/5]
tìm y biết 2/3 x 4/y x 1/5=4/45
3/4 x y/5=5/2 x 9/10
x + 4/5 = 45/5 - [3/7 + 3/5]
tính bằng cách thuận tiện nhất
137 x 3 + 137 x 97
25 x 5 + 15 x 5 + 60 x 5
428 x 97 + 428 x 2 + 428
45 x 9 + 45
64 x 4 + 18 x 4 + 9 x 8
995 x 5 + 4 x 5 + 5
655 x 6 - 355 x 6
245 x 327 - 245 x 18 - 9 x 245
462 x 4 - 62 x 4
564 x 8 - 64 x 4 x 2
37 x 18 9 x 74 + 100
679 x 78 + 679 x 23 - 679
35 : 7 - 21 : 7
( 25 x 36 ) : 9
12 : 4 + 20 : 4
Tính x biết
A X + 4/5= 45/5 -( 3/7 + 3/5)
B. 5/7 + X/35 = 4/5
tính nhanh 4/1 x 5+ 4/5 x 9 + 4/9 x 13+⋯+4/41 x 45 + 4/45 x 49
a,\(x\)\(+\)\(\dfrac{4}{5}\)=\(\dfrac{45}{4}\)\(-\)\((\)\(\dfrac{7}{5}\)+\(\dfrac{3}{5}\)\()\)
b,\(\dfrac{5}{7}\)+\(\dfrac{x}{35}\)=\(\dfrac{4}{5}\)
12:05
b1 : rút gọn rồi tính
a, 2/5 + 9/5
b, 15/45 + 25/30
c,28/32 + 45/72
d,8/28 + 5/30
b2 : tìm x
a, x - 4/5 = 4/5 + ( 3/7 + 3/5 )
b, x - 7/35 = 4/5
/ là phần
