Вычисли.
700 + 40 + 5;
200 + 30 + 9;
100 + 80 + 2;
4 + 10 + 600;
600 + 70;
80 + 200;
300 + 5;
6 + 200.
700 + 40 + 5 = 700 + (40 + 5) = 700 + 45 = 745;
200 + 30 + 9 = 200 + (30 + 9) = 200 + 39 = 239;
100 + 80 + 2 = 100 + (80 + 2) = 100 + 82 = 182;
4 + 10 + 600 = (4 + 10) + 600 = 600 + 14 = 614;
600 + 70 = 670;
80 + 200 = 200 + 80 = 280;
300 + 5 = 305;
6 + 200 = 200 + 6 = 206.