________________ a free, multi-user, multitasking operating system which means that it allows a single or multiprocessor computer to simultaneously execute several programs by one or several users.
The correct answer is A
24 × ?2 – 11 × 4 = 1900
4.004 + 5.7(2.5 – 0.5) =?
54 - 78 + 1518 + 1653 – 1252 = ?
(36/8)2× (912/38)÷ (122/1586) = ?
...54 ×70 ×33 ×42 =?
The value of 97 × 103 is _________.
10 × 100 ÷ 5 + 9 = ?
(√784 ×20+ √4225 ×14)/(√1764 ×5) = ?
∛857375 + ∛91125 = ? + √6889
30% of 8/5 × 5/7 × 2870 =?
