7.4-3.4+2.6=7.4+2.6-3.4
2006-09-16 15:02:22 · 4 answers · asked by nisha 1 in Science & Mathematics ➔ Mathematics
This is the commutative property of addition
Commutative Property of Addition states:
a + b + c = a + c + b
(In other words, the numbers can move)
Please note that this is not the associative property of addition.
Associative property of addition states:
(a + b) +c = a + ( b + c)
(In other words, the parenthesis move. The above equation has no parenthesis)
2006-09-16 15:08:22 · answer #1 · answered by Farrah 2 · 0⤊ 1⤋
7.4-3.4+2.6=7.4+(-3.4)+2.6 definition of opposite of a real number
7.4+(-3.4)+2.6=7.4+[(-3.4)+2.6] Associative
7.4+[(-3.4)+2.6] = 7.4+[2.6+(-3.4)] Conmutative
7.4+[2.6 + (- 3.4)]= 7.4+[2.6 - 3.4] Substraction definition
7.4+[2.6 - 3.4] = 7.4+2.6 - 3.4 Associative
You have applied too (many times) transitivity of the equality to state that the first expression is equals to the last one.
Ana
2006-09-16 22:17:15 · answer #2 · answered by Ilusion 4 · 0⤊ 1⤋
Commutativity and associativity of addition
2006-09-16 22:07:03 · answer #3 · answered by kuxuru 3 · 0⤊ 0⤋
some multiplications, and addition in the correct order
2006-09-16 22:22:46 · answer #4 · answered by locuaz 7 · 0⤊ 0⤋