Exactly as in the question: 7+5 = 12
20
Commutativity of addition or the fact that addition is Abelian.
57
the number is 11
Exactly as in the question: 7+5 = 12
19 plus 12 equals 31. This is because addition is a mathematical operation that combines two numbers to find their total sum. In this case, adding 19 and 12 together results in a sum of 31.
20
12.
9
Commutativity of addition or the fact that addition is Abelian.
57
the number is 11
12
The sum of 8 and 4 is 12. In mathematics, addition is the operation of combining two or more numbers to find their total. In this case, when you add 8 and 4 together, you get the sum of 12.
5 x 7 and 6 x 7
Adding zero to any number exemplifies the identity property of addition. For example, 12 + 0 = 12 where adding zero does not change the sum.