-313
7 and -40
The sum is the total when numbers are added together, the product is the total when they are multiplied.
The way in which numbers are grouped when added or multiplied does not change the sum or product.
Associative
These numbers have to be multiplied/added by other numbers in order to get other numbers. Otherwise I assume you mean the sum of 2+0 which is 2, and the product of 9x1 which would be 9.
Commutative property
commutative property
commutative property
How about: 2*2 = 4 and 2+2 = 4
Their sum is -12
355
280 Mean, which is the same as average, is the sum of the numbers divided by the quantity of the numbers: (280 + 280 + 250 + 320 + 270) ÷ 5
105