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0.4*1.35*2.5

=(0.4*2.5)*1.35

=1*1.35

=1.35

0.45*0.2*50

=0.45*(0.2*50)

=0.45*10

=4.5

3.5*2.01

=3.5*(2+0.01)

=3.5*2+3.5*0.01

=7+0.035

=7.035

1.45*6.5+0.55*6.5

=(1.45+0.55)*6.5

=2*6.5

=13

6.12*99+6.12

=6.12*(99+1)

=6.12*100

=612

5.9*101-5.9

=5.9*(101-1)

=5.9*100

=590

0.8*0.8*125

=0.8*(0.8*125)

=0.8*100

=80

本文到此讲解完毕了，希望对大家有帮助。