0,4*3,2*5*0,02*250,5*12,5*0,688*20*0,82,3*6,9+7,7*6,945,16*1,04+1,04*54,84Удобным...

Решите задачу:

$0.4 \times 3.2 \times 5 \times 0.02 \times 25 = (0.4 \times 25) \times (5 \times 0.02) \times 3.2 = 10 \times0.1 \times 3.2 = 1 \times 3.2 = 3.2$

$0.5 \times 12.5 \times 0.688 \times 20 \times 0.8 = (0.5 \times 20) \times (12.5 \times 0.8) \times 0.688 = 10 \times 10 \times 0.688 = 100 \times 0.688 = 68.8$

$2.3 \times 6.9 + 7.7 \times 6.9 = 6.9 \times (2.3 + 7.7) = 6.9 \times 10 = 69$

$45.16 \times 1.04 + 1.04 \times 54.84 = 1.04 \times (45.16 + 54.84) = 1.04 \times 100 = 104$