Question

Помогите!! номер 7,8,9! дам 50 баллов

Answer 1

$- 0.1 - ( - frac{5}{7} ) = - frac{1}{10} + frac{5}{7} = \ \ = frac{ - 7 + 50}{70} = frac{43}{70}$
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$- 19 + | - 52 | = - 19 + 52 = 33$

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$ab = | - 24| + |39| = 24 + 39 = 63$
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Answer 2

$1. -frac{1}{10} +frac{5}{7} =frac{50}{70}-frac{7}{70}=frac{43}{70} \\ OTBET: 3)\\ 2.52-19=33\\ OTBET:3)\\ 3.39-(-24)=39+24=63\\ OTBET:4)$