99,999,999,980,000,000,001
The answer is 99'999'999'980'000'000'001.
1,646,090,535
The answer is Zero. Something multiplied by 0 is always 0. If you still do not get it, add 0 to itself 9999999999 times.
999 + 9999999999 + 9999999999 + 8888888 = 20,008,889,885
99,999,999,980,000,000,001
The answer is 99'999'999'980'000'000'001.
1,646,090,535
9,999,999,998,999,999,990,000,000,001
1,646,090,535
The answer is Zero. Something multiplied by 0 is always 0. If you still do not get it, add 0 to itself 9999999999 times.
999 + 9999999999 + 9999999999 + 8888888 = 20,008,889,885
'and'.
1234567890+9876543210=11,111,111,100
9876543210 - 9876543110 = 100
1234567890 x 9876543210 = 12193263111263526900
It is 2e9