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2022-07-18 19:53:45
??????
2022-07-17 20:16:27
abcd+a+b+c+d=1990
1980+4+3+2+1=1990
2022-07-17 20:07:25
lúc đầu, thùng thứ nhất nhiều hơn thùng thứ hai là
46 - 14 = 32 [ lít ]
lúc đầu, thùng thứ hai có số lít đầu là
[142 - 32] . 2 = 55 [ lít ]
lúc đầu, thùng thứ nhất có số lít dầu là
142 - 55 = 87 [ lít ]
ko có dấu ngoặc chòn dùng tạm ngoặc vuông nhá
2022-07-17 19:53:29
mẫu số chung của 5 và 5 là 1
2022-07-17 19:38:02
A=1+2+3+4+5+6+...+50
=[50+1]+[49+2]+[48+3]+...+[26+25]
=51.25
=1275
2022-07-17 19:24:05
là 9930000000000000000...............0000000
2022-07-17 19:22:25
là 99300000000...............00000
2022-07-17 19:15:28
ho có ngoặc chòn cho mình gi tạm ngoặc vuông
[7x+8]:5=10
7x+8 =10.5
7x+8 =50
7x =50-8
7x =42
x =42:7
x =6
2022-07-17 19:09:04
2022-07-17 19:07:04
1008;1009