They are all single digit numbers.
The sequence "12345678910 1234567890" appears to be a string of numbers without a clear context or meaning. The first part, "12345678910," is simply the numbers 1 through 10 concatenated, while "1234567890" represents the digits 0 through 9 in order. If you have a specific context or question about these numbers, please provide more details!
zero
1234567890
1234567890 + 4563217890 = 5797785780
456789 * 1234567890 = 5.63937032 × 1014
1234567890
they stay the numbers until you press shift
Yes, 1234567890 is a real number. If you put any numbers together it makes yet another number.
1234567890
the sum of two numbers is
1234567890
2469135780
zero
u culd make 80
1234567890-1234567856 = 34
1.52415788 × 1018
1 plus 1234567890 is 1234567891