ЧАСТИНА 2 - Вправи: 1110

1110. Виконай дії:

1) 156 + (–249) + (–58) + 2712 = 156 + 2712 + ((–249) + (–58)) = 310 + 712 + (–232 + 4572) = 31712 + (–27772) = 4512 + (–3572) = 130 - 572 = 12572;

2) –749 + 634 + (–2512) = –749 + (–2512) + 634 = –916 + 1536 + 634 = –93136 + 634 = – (93136 – 634) = –331 - 2736 = –3436 = –319;

3) –215 + 92125 + (–5710) = –215 + (–5710) + 92125 = –72 + 710 + 92125 = –7910 + 92125 = 92125 – 7910 = 84625 – 7910 = 1184 - 90100 = 194100 = 14750;

4) –42,08 + (–625) + (–734) = –(42,08 + 6,4 + 7,75) = –56,23;

5) –5,1 + (–3310) + 513 + (–0,7) = –5,1 + (–3,3) + (–0,7) + 513 = –9,1 + 513 = –(9110 – 513) = –(81110 – 513) = –333 - 1030 = –32330;

6) –325 + (–8,75) + 15310 + (–6815) = –325 + (–834) + (–6815) + 15310 =

= –1724 + 45 + 3260 + 15310 = –1710160 + 15310 = –184160 + 15310 = –(184160 – 15310) = –341 - 1860 = –32360.