14 × 0.5 – 1 = 6 6 × 1 – 2 = 4 4 × 2 – 4 = 4 4 × 4 – 8 = 8 8 × 8 – 16 = 48
5121.3 × 641.8 ÷ 80.5 = 8?
18, 25, 33, 42, 52, 63, ?
`sqrt(7744)` - `sqrt(4761)` + `sqrt(8281)` + `sqrt(5625)` + ? = 1856
18 + 28÷ 4 - 14 = ? - 35
...30, 39, 66, ? , 174, 255
5/13 × 104 + 1(2/9) × 198 = 133 + ?
(1/8) × (256 × 2)/(8 × 4) + ?3 = 1730
√1369 + √1024 + √841 =(?)2 − 46
1220 ÷ 61 ÷ 5 + 450 of 20% - 70 = √ ?
Simplify the following expression:
(400 +175) ² - (400 – 175) ² / (400 × 175)
