Question

ПОМОГИТЕ С ДЗ СРОЧНООООО

Answer 1

Відповідь:

1. 1. 4 × 17 × 25 = 100 × 17 = 1 700;

2. 5 × 673 × 2 = 10 × 673 = 6 730;

3. 8 × 475 × 125 = 1 000 × 475 = 475 000;

4. 73 × 5 × 4 = 73 × 20 = 1 460;

5. 2 × 916 × 50 = 100 × 916 = 91 600;

6. 5 × 9 × 200 = 1 000 × 9 = 9 000.

2. 1. 12 × 3х = 12 × 3 × х = 36х;

2. 10х × 6 = 10 × 6 × х = 60х;

3. 5a × 7b = 5 × 7 × а × b = 35аb;

4. 8m × 12n = 8 × 12 × m × n = 96mn.

3. 1. 47 × 632 + 632 × 53 = 632 × (47 + 53) = 632 × 100 = 63 200;

2. 598 × 49 – 597 × 49 = 49 × 1 = 49.

4. 1. 4 × (а + 2) = 4 × а + 4 × 2 = 4а + 8;

2. 3 × (m – 5) = 3m – 15;

3. (p – q) × 9 = p × 9 – q × 9 = 9p – 9q;

4. 12 × (a + b) = 12a + 12b;

5. 5 × (2m – 1) = 5 × 2m – 5 × 1 = 10m – 5;

6. (3c + 5d) × 14 = 3c × 14 + 5d × 14 = 42c + 70d.