Question

1.（1十0.23十0.34）*（0.23十0.34十0.56）一（1十0.23十0.34十0.56）*（0.23十0.

Answer 1

1.设A=0.23十0.34 B=0.23十0.34十0.56

原式=（1+A)*B-(1+B)*A

=B*AB-A*AB

=B-A

=0.23十0.34十0.56-(0.23十0.34)

=0.56

2.A+B=0.00...012508 1996个0

A*B=0.00...1 3996个0

A/B=126.25

3.4.2*5-（1/0.25+9.1/0.7）]/0.04=100