3254+146+169
=3400+169
=3569
4.27.25
=108.25
=2700
638+780.5-369:9
=638+3900-41
=4538-41
=4497
779:41.16.(425-249)
=779:41.16.186
=19.16.186
=304.186
=56544
25.5.4.27.2
=125.4.27.2
=500.27.2
=13500.2
=27000
28.64+28.36
=28.(64+36)
=2800
(42.43+43.57+43)-360:4
=(1806+2451+43)-360:4
=4300-360:4
=4300-90
=4210
a) = 3400 + 169 = 3569
b) = 108 x 25 = 2700
c) = 638 + 3900 - 369 : 9 = 4497
d) = 779 : 41 x 16 (435 - 249) = 56544
e) = 125 x 4 x 27 x 2 = 27000
f) = 1792 + 28 x 36 = 2800
g) = 43 x 100 - 90 = 4210