No. There's no two digit numbers that could do this.
The largest two digit number is 99. If you add 99 to itself, you only get 198, which is much smaller than a four digit number.
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
The number of digits increases - without limit.
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.
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
10000-99=901
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.
32 is the smallest two-digit number that can be multiplied by itself to give a four-digit number. (32x32)=1024