ЧАСТИНА 2 - Вправи: 1349

1349. Виконай дії:

1) 313 · (–234 : 512) = 313 · (–11 ∙ 24 ∙ 11) = 313 · (–12) = – 10 ∙ 13 ∙ 2 = – 53 = –123;

2) 225 : (11115 – 325) · (–56) = 115;

1) 11115 – 325 = –(275 – 11115) = –121 - 1115 = –11015 = –123;

2) 225 : (–123) = – 12 ∙ 35 ∙ 5 = – 3625;

3) – 3625 · (–56) = 65 = 115;

3) (63,45 : (–4,7) + 9,3) : (–415)= (–13,5 + 9,3) : (–415) – 4,2 : (–4,2) = 1

4) (–5025 : (–5,6) + 6,4) : (–125) = –11;

1) –5025 : (–5,6) = –50,4 : (–5,6) = 9;

2) 9 + 6,4 = 15,4;

3) 15,4 : (–1,4) = –11.