3645 + 1
No
it goes up by two.
If you have 1 and 1, that means it is two. To add a number, count up the number you have from the original number you are adding to.
You line up the last numbers and then add it!
None. Any two odd numbers add up to an even number.
Yes because the numerators add up to equal a whole number which is 1
the two numbers in the circles add up to the number in the square box!
The numbers are 17 and 18.
-121
Always an even number. Think of an odd number as an even number plus a half. Add them up and the two halves make an even.
398
None. If you add two even numbers, you'll end up with another even number.