600:20*5:2 600: (20*5) : 2 128:4*3+5*3 128:4 * (3+5) * 3 54: (9-3) * (72:36) 54:9-3 * (72:36)

а) 600 / 20 * 5 / 2 = 750;

1. 600 / 20 = 30;

2. 30 * 50 = 1500;

3. 1500 / 2 = 750;

б) 600 / (20 * 5) / 2 = 3;

1. 20 * 5 = 100;

2. 600 / 100 = 6;

3. 6 / 2 = 3;

в) 128 / 4 * 3 + 5 * 3 = 111;

1. 128 / 4 = 32;

2. 32 * 3 = 96;

3. 5 * 3 = 15;

4. 96 + 15 = 111;

г) 128 / 4 * (3+5) * 3 = 768;

1. 3 + 5 = 8;

2. 128 / 4 = 32;

3. 32 * 8 = 256;

4. 256 * 3 = 768;

д) 54 / (9 - 3) * (72 / 36) = 18;

1. 9 - 3 = 6;

2. 72 / 36 = 2;

3. 54 / 6 = 9;

4. 9 * 2 = 18;

ж) 54 / 9 - 3 * (72 / 36) = 0;

1. 54 / 9 = 6;

2. 72 / 36 = 2;

3. 3 * 2 = 6;

4. 6 - 6 = 0;