1). What is the sum of 8, 4, 6 and 3? 2). Subtract 48 from 86. 3). What is the product of 15 and 24? 4). Divide 325 by 5. 5). What is the area of a square with a length of 10 cm? 6). Add 11 and 7 then multiply the sum by 3. 7). Multiply 12 by 9 and then subtract 27. 8). What is the square root of 256? 9). What is the decimal form of 4/5? 10). If a rectangle has a width of 16 cm and a length of 12 cm, what is its perimeter?