Basically there are 3 addition properties and they are associative property, identity property, and commutative property.
Commutative property is just changing the order of the addends. Example: 26+19+34+21= 21+34+19+26
Identity Property is just adding a 0 to the number that doesnt change anything. Example: 26+19+34+21 +0 = 100
Associative property is just changing the grouping of the addends. Example: (26+19) + (34+21)
I know these properties may be complicated i know inhate them too haha but i hope i helped :) if you want you can search up the distributive property too but its with multiplication and addition combined and its harder but i think these are the 3 main properties.
Lets round it to the nearest ten A 97 ====> 100 B 118 ===> 120 C 179 ===> 180 D 5091 ==> 5090 No result yet, lets round to the nearest hindred. A 97 ====> 100 B 118 ===> 100 C 179 ===> 180 D 5091 ==> 5100 As we can see only A give the same result when we round it to the nearest hundred and nearest ten.
