127
I am not sure if any two consecutive numbers can add up to an even number.
Start with the natural numbers, 0, 1, 2, ... .Then add the set of negative numbers: this makes up the integers. Next add in the set of ratios of any two integers (the second being non-zero): this makes up the rational numbers. Next add in the set of all numbers which cannot be expressed as terminating or repeating decimal numbers. This is the set of irrational numbers. The rationals and irrationals, together, make up the set of real numbers.
2 and 17
A negative and a positive number will multiply to a negative number. Other than that, -9 and -8 will satisfy your conditions.
The sum of two negative numbers is going to sum up to a negative number EX:-2+-5=-7
66
127
-8 and +7
120
When you add two negative numbers you would end up with a negative number.eg; -4 + -5= -9It helps using a number line, coins, and other objects!
115
29
11
62
3x-3
(Positive 462) + (Negative 462) = 0