tính hợp lý giúp em>< 15.(-9)-9.85 25.(–8).4.(–3) -24 + 65 - 76 35.(14 –10) – 14.(35 –10) có từng bước nka ac><

Giải thích các bước giải:

a,15.(−9)−9.85a,15.(-9)-9.85

=−9.(15+85)=-9.(15+85)

=−9.100=−900=-9.100=-900

b,25.(−8).4.(−3)b,25.(-8).4.(-3)

=(25.4).[(−8).(−3)]=(25.4).[(-8).(-3)]

=100.24=2400=100.24=2400

c,−24+65−76c,-24+65-76

=(−24−76)+65=(-24-76)+65

=−100+65=−35=-100+65=-35

d,35.(14−10)−14(35−10)d,35.(14-10)-14(35-10)

=35.14−35.10−14.35−14.10=35.14-35.10-14.35-14.10

=(35.14−14.35)−35.10−14.10=(35.14-14.35)-35.10-14.10

=0−10.(35−14)=0-10.(35-14)

=−10.21=−210