Ответ:

6 × (0.003 + 0.997) × (5 × 0.4 + 1.7) - 16.8 = 5.4

1) 0.003 + 0.997 = 1.

2) 6 × 1 = 6.

3) 5 × 0.4 = 2.

4) 2 + 1.7 = 3.7.

5) 6 × 3.7 = 22.2

6) 22.2 - 16.8 = 5.4