we have
[tex]-4.6+(-0.4)+(-7.2)[/tex]
Possibility N 1
[tex]=-4.6-0.4-7.2\\=-(4.6+0.4+7.2)[/tex]
Possibility N 2
[tex]=-4.6-0.4-7.2\\=-4.6-(0.4+7.2)[/tex]
Possibility N 3
[tex]=-4.6-0.4-7.2\\=-0.4-(4.6+7.2)[/tex]
Possibility N 4
[tex]=-4.6-0.4-7.2\\=-7.2-(4.6+0.4)[/tex]
Answer:
We have to evaluate the expression ,which consist of negative rationals or Decimals :
= -4.6 + (-0.4)+(-7.2)
= As , (+)(-)= -v e
So, Opening the brackets, the expression transforms to
= -4.6 - 0.4 - 7.2
When there is negative sign before two decimals, we add the two decimals and place negative sign before the result.
= (-4.6 - 0.4)-7.2
= -5.0 -7.2
= -12.2
As, Rationals or Decimals are associative and commutative under addition.
So, -4.6- 0.4 -7.2 , will be equivalent to
1. -4.6 + (-0.4-7.2)
2.-4.6 + (-7.2-0.4)
3. (-4.6 - 7.2)-0.4
4. (-7.2 -4.6)-0.4
5. (-0.4 -4.6)-7.2
6. ( -4.6 -0.4) -7.2
