1.
$35.18 - 5.7.28 = 35.18 - 35.28 = 35.(18 - 28) = 35.(-10) = -350$
2.
$45 - 5.(12 + 9) = 5.9 - 5.(12 + 9) = 5.(9 - 12 - 9) = 5.(-12) = -60$
3.
$24.(16 - 5) - 16.(24 - 5) = 24.16 - 24.5 - 16.24 + 16.5 = -5.(24 - 16) = -5.8 = -40$
4.
$29.(19 - 13) - 19.(29 - 13) = 29.19 - 29.13 - 19.29 + 19.13 = -13.(29 - 19) = -13.10 = -130$
5.
$31.(-18) + 31.(-81) - 31 = 31.(-18 - 81 - 1) = 31.(-100) = -3100$
6.
$(-12).47 + (-12).52 + (-12) = (-12).(47 + 52 + 1) = (-12).100 = -1200$
7.
$ 13.(23 + 22) - 3.(17 + 28) = 13.45 - 3.45 = 45.(13 - 3) = 45.10 = 450$
8.
$-48 + 48.(-78) + 48.(-21) = -48.(1 + 78 + 21) = -48.100 = -4800$
