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Crank
3 years ago
9

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

Mathematics
2 answers:
AURORKA [14]3 years ago
5 0

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.

astra-53 [7]3 years ago
3 0
Well 1+7 =8
And 7+1 are the same digits so 1+7=7+1=8
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