y x 15 + y x 13 = 560 x 45
y x ( 15 + 13 ) = 25200
y x 28 = 25200
y = 25200: 28
y = 900
\(y\times15+y\times13=560\times45\)
\(y\times\left(15+13\right)=25200\)
\(y\times28=25200\)
\(y=25200:28\)
\(y=900\)
y x 15 + y x 13 = 560 x 45
y x ( 15 + 13 ) = 25200
y x 28 = 25200
y = 25200: 28
y = 900
\(y\times15+y\times13=560\times45\)
\(y\times\left(15+13\right)=25200\)
\(y\times28=25200\)
\(y=25200:28\)
\(y=900\)
rut gon phan so
15 nhan 64 phan 16 nhan 40
2 nhan 3 nhan 5 phan 70
21 nhan 45 phan 9 nhan 7 nhan 5 nhan 3
2 3\13 nhan 27\58 nhan 2 15\24 nhan 8\21 chia 3\7
1 , tinh bang cach tien nhat
[500 cong 115 ] nhan 55 cong[ 600 cong 15 ] nhan 15 cong [ 700 - 85] nhan 85 cong [ 900 -285 ] nhan 45
giai tung buoc cho minh nha
tim y : y nhan 2 + y nhan 3 = 1985
73 nhan 46+ 27 nhan 46
84 nhan 312+ 18 nhan 312
15 nhan 5 +15 nhan 6 -15 +100
x chia [9 nhan 6]=4
1 khu rung phong ho hcn co chieu rong 378m chieu dai gap 3 chieu rong tinh dien tich khu rung do
Tinh nhanh:19 nhan 18 nhan 25/12 nhan 15 nhan 38
An co 50 nhan vo hung nhieu hon an 15 nhan vo it hon binh 15 nhan vo hoi trung binh moi ban co bao nhieu nhan vo
Cau 5:
tim y biet:
28 + y nhan 3+ 325 = 325+ 28 + 27 nhan 3
y =?
tinh theo mau]
a, 15 nhan 7
30 nhan 11;
b, 4 nhan 5nhan 6
12nhan 15 nhan 9
c, 6nhan 8nhan11
33 nhan 16