2/3 plus 4/6 equals 1 1/3. 2/3 has the same value as 4/6 so in effect you are adding 4/6 and 4/6 together, which equals 8/6 or 1 1/3.
-3
6-7+(-3) = -1 +(-3) = -1 -3 = -4
13a - 6 + a = 5a + 3 + 3a 13a + a - 5a - 3a = 3 + 6 6a = 9 6a/6 = 9/6 a = 3/2
It is 16.
2/3 plus 4/6 equals 1 1/3. 2/3 has the same value as 4/6 so in effect you are adding 4/6 and 4/6 together, which equals 8/6 or 1 1/3.
6 plus 6 plus 6 is 18. It is the same as 6 x 3 = 18
-3
Only when a and b have the same sign (or when a or b equals 0). Here are some examples: |2+4|=|2|+|4|--> |6|=|6|--> 6=6 TRUE |(-1)+(-3)|=|(-1)|+|(-3)|--> |(-4)|=1+3--> 4=4 TRUE |3+(-6)|=|3|+|(-6)|--> |(-3)|=3+6--> 3=9 FALSE
6-7+(-3) = -1 +(-3) = -1 -3 = -4
13a - 6 + a = 5a + 3 + 3a 13a + a - 5a - 3a = 3 + 6 6a = 9 6a/6 = 9/6 a = 3/2
If 3x + 3 = 2x + 6 then 3x - 2x = 6 - 3 x = 3
3+6=6+3 3 plus 6 equals 6 plus 3 Commutative is just the two numbers in an addition equation reversed.
3 of anything plus 3 more of the same thing is 6 of them.
6/16 and 12/32 have the same value as 3/8.
6
It is 16.