Respuesta :
This question is so easy.
7.8+(3.5x6.8)-1.5
=7.8+23.8-1.5
=30.1
7.8+(3.5x6.8)-1.5
=7.8+23.8-1.5
=30.1
first multiple 3.5 with w which is 6.8, then collect 7.8 with the result (23.8) and finally substrack 1.5.
to make it easier after multiple write the numbers on end.
to make it easier after multiple write the numbers on end.