Question

1,3и4 быстрее решите

Answer 1

Вариант А1
Номер 1
$a) - 1.5 times ( - 6) = 9 \ b) - 1 frac{1}{3} times 0.75 = - frac{4 times 75}{3 times 100} = - 1 \ c) - 2.16 div 0.36 = - 6$
$d) - 3 frac{1}{7} div ( - frac{11}{14} )= frac{22 times 14} {7 times 11} = 4$
Номер 3
$a)- 0.3x + 0.9 = - 4.2 \ - 0.3x = - 4.2 - 0.9 \ - 0.3x = - 5.1 \ x = 17$
$b)(2 - x)(x + 3) = 0 \ 2 - x = 0 \ x = 2 \ x + 3 = 0 \ x = - 3$
Номер 4
$a) - 0.28 times frac{4}{7} + frac{5}{7} div 2 frac{6}{7} = - frac{28 times 4}{100 times 7} + frac{5 times 7}{7 times 20 } = - frac{4}{25} + frac{1}{4} = 0.16 + 0.25 = 0.41$

$b)( - frac{2}{3} ) ^{2} times 2 frac{1}{4} times ( - 3) = frac{4}{9} times frac{9}{4} times ( - 3) = - 3$