ЧАСТИНА 2 - Вправи: 1074

1074. Обчисли значення виразу:

1) 478 + (–319) = 478 – 319 = 163 - 872 = 15572;

2) –427 + (–513) = –96 + 721 = –91321;

3) –729 + 356 = –(729 – 356) = –(6119 – 356) = –322 - 1518 = –3718;

4) –12 + 9811 = –(12 – 9811) = –(111111 – 9811) = –2311;

5) –1310 + 2,7 = –1,3 + 2,7 = 1,4;

6) –5,25 + 434 = –5,25 + 4,75 = –(5,25 – 4,75) = –0,5;

7) 2,81 + (–1710) = 2,81 + (–1,7) = 1,11;

8) 189 + (–2,05) = 189 + (–2120) = –(2120 – 189) = –(12120 – 189) = –189 - 160180 = – 29180.