=9+3

= 12。

(2)4.2 divided by1.5+5.8x1.5 = 2.8+8.7.

= 1 1.5。

(3)27.8 divided by 0. 125 divided by 8=27.8 divided by (0. 125x8)

=27.8 divided by 1

=27。 8。