Частина 2. Номер 379

Виконай дії.

180 : 9 + 20 = 20 + 20 = 40;

640 : 8 + 80 = 80 + 80 = 160;

280 : 7 + 40 = 40 + 40 = 80;

270 : 3 + 90 = 90 + 90 = 180;

280 : 2 – 140 = 140 – 140 = 0;

490 : 7 – 15 = 70 – 15 = 55;

360 : 3 – 120 = 120 – 120 = 0;

40 – 160 : 4 = 40 – 40 = 0;

100 + 540 : 9 = 100 + 60 = 160.