This is a numeric palindrome -- spelled (or in this case numbered) the same way forward and backward.
zero
1234567890 + 4563217890 = 5797785780
456789 * 1234567890 = 5.63937032 × 1014
1234567890 multiplied by 1234567890 equals 1,524,157,900,000,000. This result is obtained by performing the multiplication operation on the two numbers.
The exponent of 1234567890 is 1 because anything to the 1st power equals that number.
1,219,326,311,126,352,690
2222222211
To round to the nearest 100, look at the 10s digit to decide whether to round up or down. The 10s digit of 6963 is 6 which is 5 or more, so round up: 6963 → 7000 to the nearest hundred.
1234567890
2469135780
zero
1234567890-1234567856 = 34
1.52415788 × 1018
1 plus 1234567890 is 1234567891
1234567890+9876543210=11,111,111,100
1234567890 + 1098765432 = 2333333322
4000 + 1234567890 = 1234571890