Q: If you add a two digit number to a two digit number can you get a four digit number?

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No. When adding the smallest 2 digit number (= 10) to the smallest 2 digit number (again, 10) the result is a 2 digit number (10 + 10 = 20). When adding the largest 2 digit number (= 99) to the largest 2 digit number (again, 99) the result is a 3 digit number (99 + 99 = 198). As you can see, you'll either get a 2 or 3 digit number, but never a 4 digit number.

Add the two greatest possible four digit numbers. 9999 + 9999

Four. (100 x 10 = 1,000)

1001

If you realize that a 4 digit palindrome is basically a two digit number followed by it's own reverse, you can re-phrase this question as 'how many two digit numbers are there?' Which would then mean that (if you're considering zeros as digits without a non-zero leading term) there would be a 4 digit palindrome 0000 for the two digit 00; a four digit 0110 for the two digit 01; 0220, 02; etc etc. So the number of four digit palindromes would be the same as the quantity of whole numbers from 00 to 99. So I believe the total answer to your question would be 100.

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2000.The smallest four-digit number there can be is 1000. So, add 1000 and 1000 to get 2000, then least sum you can get when adding two four-digit numbers.

You line up the last numbers and then add it!

No. When adding the smallest 2 digit number (= 10) to the smallest 2 digit number (again, 10) the result is a 2 digit number (10 + 10 = 20). When adding the largest 2 digit number (= 99) to the largest 2 digit number (again, 99) the result is a 3 digit number (99 + 99 = 198). As you can see, you'll either get a 2 or 3 digit number, but never a 4 digit number.

-99

11

It is easier to simply add two one-digit numbers than to mess about with estimation!

Multiply the three-digit number by the one's digit, or last digit, of the two-digit number. That is your first part. Now multiply by the second-to-last digit, or ten's digit, and multiply the result by 10. That is your second part. Add the two parts and that is your answer.

If you're referring to how to solve it manually (e.g. pencil and paper), you'd simply add zeroes to the dividend (the number being divided into) and a decimal to the quotient (the answer) at the point the zeros were added.

Add the two greatest possible four digit numbers. 9999 + 9999

33 is a two-digit number whose digits add up to 6. 60, 51, 42, 24, 15

32 is the smallest two-digit number that can be multiplied by itself to give a four-digit number. (32x32)=1024

10000-99=901