1) 1000000 × π ≈ 3141592.6536
2) <span>694219 × 56 - 2579 +1000
</span><span>694219 × 56= 38876264
</span><span>38876264 - 2579 = 38873685
</span><span><span>38873685 </span>+ 1000 = 38874685</span>
4x + 5x = 450
9x = 450
x = 50
5x = 250
Ответ: 250 см
2,75:x=0,275
x=2,75:0,275
x=10
в 10 раз