Ответ:

а)

[tex]( - 2.04 \div ( - 4) - ( - 3.4 \times 0.3)) \div ( - 0.06)[/tex]

=

[tex]( \frac{51}{25} \div ( - 4) - ( - 1.02)) \div ( - \frac{3}{50} )[/tex]

=

[tex]( \frac{51}{25} \times \frac{1}{4} + 1.02) \div ( - \frac{3}{50} )[/tex]

=

[tex]( \frac{51}{100} + \frac{51}{50} ) \div( - \frac{3}{50} )[/tex]

=

[tex] \frac{153}{100} \div ( - \frac{3}{50} )[/tex]

=

[tex] - \frac{153}{100} \times \frac{50}{3}[/tex]

=

[tex] - \frac{51}{2} [/tex]

=

[tex] - 25.5[/tex]

б)

[tex]1.6 \div ( - 0.02) + 0.66 \div (0.09 - 0.1)[/tex]

=

[tex] \frac{8}{5} \div ( - \frac{1}{50} ) + \frac{33}{50} \div ( - 0.01)[/tex]

=

[tex] - \frac{8}{5} \times 50 + \frac{33}{50} \div ( - \frac{1}{100} )[/tex]

=

[tex] - 8 \times 10 - \frac{33}{50} \times 100[/tex]

=

[tex] - 80 - 33 \times 2[/tex]

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[tex] - 80 - 66[/tex]

=

[tex] - 146[/tex]