Частина 2 — Вправи: 1247

1247. Обчисліть:

1) –5 – 15 – (–28) – 14 = –5 – 15 + 28 – 14 = –6;

2) 2 – 29 – (–8) – 11 = 2 – 29 + 8 – 11 = –30;

3) 27,56 – 36 – 27,56 – (–12) = 27,56 – 36 – 27,56 + 12 = –24;

4) 39,126 – 12,1 + 18 – 21,026 = (39,126 – 21,026) + (–12,1 + 18) = 18,1 + 5,9 = 24;

5) –3 – (–215) – (–215) = –155 + 115 + 215 = –45 + 215 = -12 + 215 = –1015 = –23;

6) 1029 – (–419) – 37 – (–523) = (1029 + 419 + 523) – 37 = (1029 + 419 + 569) – 37 = 1999 – 37 = 20 – 37 = –17.