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

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1 vote
Well 1+7 =8
And 7+1 are the same digits so 1+7=7+1=8
User Dana Woodman
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Explanation: For this, we take two different numbers.

Let the first number be
x and the second number be
y

We use the commutative property, which says that the sum will remain same in whatever way the numbers are written.

Mathematically,


x+y=y+x

From the question,

x = 1

y = 7

Putting this in the commutative property equation, we get:


1+7=7+1

Hence, the sum of both the umber will be same.

User Merrick
by
7.3k points

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