Question

Explain how knowing 1+7 helps you find the sum for 7+1

Answer 1

We can use the concept of commutative property of addition here. We know that the addition follow the commutative property.

The commutative property of addition is given by

$a+b=b+a$

It means, if we change the order, it will not affect the result.

Therefore, using above mentioned property, we can see that

1+7 = 7+1

Hence, if we know the value of 1+7, then we can easily find the value of 7+1 because both are same.

Answer 2

Because they both equal the same sum