Question

Properties to fine the sum or product 34+0+18+26

Answer 1

Hey there!

Commutative property: $18 + 0 + 34 + 26$

Identity property: $34 + 18 + 26$

$34 + 26 = 60$

Associative property: $60 + 18 = 78$

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$30 + 0 + 18+26 \\ 34 + 0 = 34 \\ 34 + 18 + 26 \\ 34 + 18 = 52\\ 52 + 26 = 78 \\ = 78$

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Answer 2

The commutative property of addition can be used to rarrange this to

... 0 + 18 + 34 + 26

Then the identity property of addition can be used to remove the 0 term

... 18 + 34 + 26

We can use the associative property of addition to form the sum of 34 and 26, convenient because 4 and 6 "make a 10". That sum is 60, so now the sum is

... 18 + 60

which is easily seen to be

... 78