Step-by-step explanation:
[tex]4(6-1.5)[/tex] .... as we do inside the parenthesis first [tex]6.0 - 1.5 = 4.5[/tex]
[tex]=4(4.5)[/tex] ... ... we can re-write 4.5 as [tex]\frac{9}{2}[/tex]
[tex]=4 \times \frac{9}{2}[/tex]
= 18
