Question

СДЕЛАЙТЕ 4-10 с расчетами

Answer 1

Объяснение:

4.

$- 13 \times ( - 9.3) - 7.8 = + 120.9 - 7.8 = 113.1$

5.

$0.6 \times ( - 10) {}^{3} + 50 = 0.6 \times ( - 1000) + 50 = - 600 + 50 = - (600 - 50) = - 550$

6.

$(9 \times 10 {}^{ - 2} ) {}^{2} \times (11 \times 10 {}^{5} ) = (9 \times0 .01) {}^{2} \times 1100000 = 0.09 {}^{2} \times 1100000 = 0.0081 \times 1100000 = 8910$

7.

$\frac{1}{ \frac{1}{30} + \frac{1}{42} } = 1:( \frac{7}{210} + \frac{5}{210} ) = 1 \times \frac{210}{12} = \frac{210}{12} = 17.5$

8.

$( \frac{1}{6} + \frac{1}{4} ) \times 9 = ( \frac{2}{12} + \frac{3}{12} ) \times 9 = \frac{5}{12} \times 9 = \frac{45}{12} = 3.75$

9.

$(1 \frac{3}{4} + 2 \frac{4}{5} ) \times 30 =( 1 \frac{15}{20} + 2 \frac{16}{20} ) \times 30 = 3 \frac{31}{20} \times 30 = 4 \frac{11}{20} \times 30 = 136.5$

10.

$1 \frac{1}{12} :(1 \frac{13}{18} - 2 \frac{5}{9} ) = 1 \frac{1}{12} :(1 \frac{13}{18} - 2 \frac{10}{18} ) = 1 \frac{1}{12} :( - (1 \frac{28}{18} - 1 \frac{13}{18} )) = 1 \frac{1}{12} :( - \frac{15}{18} ) = - \frac{13 \times 18}{12 \times 15} = - \frac{13}{10} = - 1.3$

Элементарно!)))