x : 2 -15 = 3
x :2 = 3 + 15
x : 2 = 18
x = 18 x 2
x= 36
Vậy..
x : 2 - 15 = 3
= x : 2 = 3 + 18
= x : 2 = 18
= x = 18 x 2
x = 36
X : 2 - 15 = 3
X : 2 = 3 + 15
X : 2 = 18
X = 18 x 2
X = 36
Vậy X = 36.
❆Hok tốt nha ♂❆
x : 2 -15 = 3
x :2 = 3 + 15
x : 2 = 18
x = 18 x 2
x= 36
Vậy..
x : 2 - 15 = 3
= x : 2 = 3 + 18
= x : 2 = 18
= x = 18 x 2
x = 36
X : 2 - 15 = 3
X : 2 = 3 + 15
X : 2 = 18
X = 18 x 2
X = 36
Vậy X = 36.
❆Hok tốt nha ♂❆
Tính nhanh
a,(1+2 +3 +...+99) x (13 x 15 – 12 x 15 –15)
b,2+4+ 6+...+ 98+100–(1+3 +5 +...+97+99)
Tính bằng cách thuận tiên nhất:
1):(3/4 x 5/97 + 1/9 x 13/47) x (1/5 - 7/25 x 5/7)
2): 8/17 x 4/15 + 8/17 x 22/15 - 8/15 x 9/17
3): 2021/2 x 1/3 + 4042/4 x 1/5 + 6063/3 x 22/15
4); 4/7 x 2/13 + 8/13 :7/4 + 4/7 : 13/2 + 4/7 x 1/13
5): 2022 x 2021 - 1/ 2021 + 2022 x 2020
6): 18 x 123 + 9 x 4567 x 2 + 3 x 5310 x 6 / (2 + 4 + 6 + 8 + ...+20 + 22) + 48
7): A= 2021 x 2021 x 202020 - 2020 x 2020 x 20212021 / 2020 x 20192019
Tính :
a) 3 / 8 + 2 / 5 + 5 / 8
b) 5 / 7 x 2 / 3 x 14 / 15
c) 3 / 8 + 2 / 5 x 5 / 8
d) 11 / 15 - ( 2/ 3 - 1 / 5 )
Tính :
a) 3 / 8 + 2 / 5 + 5 / 8
b) 5 / 7 x 2 / 3 x 14 / 15
c) 3 / 8 + 2 / 5 x 5 / 8
d) 11 / 15 - ( 2/ 3 - 1 / 5 )
tính bằng cách thuận tiện
a) 4/15 x 2016/2018+ 4/15 x 3/2018- 4/15 x 1/2018 b) 8/15 x 8 - 2 x 8/15+3 x 8/15+ 8/15X : 1/2 = 2/3 x 4/5 x 3/4 x 15/8
2 + 3/8 x 4/7 =
8/15 : 2/11 + 7/15 : 2/11 =
Tìm X
a) 4/7 x X - 1/5 = 5/9 b)9/15 + 11/15 : X = 2/3
Ét o ét . giúp tui, cần gấp
a) 4/15 x 2016/2018+ 4/15 x 3/2018- 4/15 x 1/2018 b) 8/15 x 8 - 2 x 8/15+3 x 8/15+ 8/15
Tính bằng 2 cách:
a, ( 6/11 + 5/11 ) x 3/17
b, 3/5 x 7/9 - 3/5 x 2/9
c, ( 6/7 - 4/7 ) : 2/5
d, 8/15 : 2/11 + 7/15 : 2/11