a)&b) mờ ko thấy,cn lại mik sẽ lm cho nhớ cho vote và tl hay nhòa.
c)35.18-5.7.28
=630-980=-350
d)24.(16-5)-16.(24-5)
=24.11-16.19
=264-304=-40
e)29.(19-13)-19.(29-13)
=29.6-19.16
=174-304=-130
g)31.(-18)+31.(-81)-31
=-558-2.511-31=-621,511.
h)(-12).47+(-12).52+(-12)
=-564-624-12=-1,200
k)13.(23+22)-3.(17+28)
=13.45-3.45
=585-135=450
m)-48+48.(-78)+48.(-21)
=-48-864-1,008=-913,008
n)135.(171-123)-171.(135-123)
=135.48-171.12
=6,480-2,052=4,428
p)(-2009+97)-74.(-18)+74.(-118)-2009-3
=-1,912-1,332-8,732-2009-3
=-2,023,976
