( x + 1) + )+ ( x + 2) +( x + 3) +) + ( x + 4 ) + ( x + 5 ) = 40
( x+x+x+x+x ) + ( 1+2+3+4+5 ) = 40
x*5 + 15 = 40
x*5 = 40-15
x*5 = 25
x= 25 :5
x=5
x+1+x+2+x+3+x+4+x+5=40
5*x+(1+2+3+4+5) =40
5*x+15 =40
5*x =40-15
5*x =25
x =25/5
x =5
( x + 1) + )+ ( x + 2) +( x + 3) +) + ( x + 4 ) + ( x + 5 ) = 40
( x+x+x+x+x ) + ( 1+2+3+4+5 ) = 40
x*5 + 15 = 40
x*5 = 40-15
x*5 = 25
x= 25 :5
x=5
x+1+x+2+x+3+x+4+x+5=40
5*x+(1+2+3+4+5) =40
5*x+15 =40
5*x =40-15
5*x =25
x =25/5
x =5
Tính (theo mẫu):
Mẫu: 5 x (10 – 4)
Cách 1:
5 x (10 – 4) = 5 x 6 = 30
Cách 2:
5 x (10 – 4) = 5 x 10 – 5 x 4 = 50 – 20 = 30
a) 3 x (20 – 5)
b) 20 x (40 – 1)
1. Tính bằng hai cách (theo mẫu) :
Mẫu : 2 x 5 x 4 = ?
Cách 1 : 2 x 5 x 4 = 2 x (5 x 4) = 2 x 20 = 40
Cách 2 : 2 x 5 x 4 = (2 x 5) x 4 = 10 x 4 = 40
a) 4 x 5 x 3 b) 5 x 2 x 7
3 x 5 x 6 3 x 4 x 5
2/3 = 2 x 4/ 3 x 4 =......../.........
8/14 = 8 : 2/ 8 : 2/ 14 : 2 =........./..........
5/9 = 5 x......./ 9 x 3 =......../.........
35/ 40 = 35 : 5/ 40 : ............. =......./...........
giúp mình với trả lời mình tick cho nhé
a)40 * x=1440
b)x:13=205
c)2057
d)tính bằng cách thuạn tiện nhất:
36 x 25 x 4=?
18x24:9=?
41 x 2 x 8 x 5=?
215 x 86 + 215 x 14=?
53 x 128 - 43 x 128=?
2/3 x 4/7=?
2 x 3 x 4 / 2 x 3 x 4 x 5=?
1 x 2 x 3 x 4 / 5 x 6 x 7 x 8
x : 7/11=22
2/7 * x=2/3
Bai toan 1
x+1+x+1+x+1+x+1+x+1+x+1+3nhan x+3=189585.
Bai toan 2
Tim 5 phan so lon hon phan so 4/5 va be hon phan so 5/6.
Bai toan 3
Moi chuyen xe khach cho duoc 40 nguoi (ke ca nguoi lai xe).Hoi co 400 khach thi phai can it nhat bao nhieu xe de cho het so khach do?
Bai toan 4
x+1+x+1+x+1+x+1+x+1+x+1+3 nhan x+3=189585
x +3/4x7/10=53/40
(2/5+4/7):x=17/5
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
tìm x,biết
a. \(5\times\left(3+7\times x\right)=400\)
b.\(x\times37+x\times63=1200\)
c.\(x\times6+12:3=40\)
d.\(4+6\times x\left(x+1\right)=70\)
e.\(163:x+34:x=10\)
mik sẽ chỉ tick 2 bn thoy vì mik đag cần gấp