535 add 275 = 810
810
Well, darling, it's simple math. If you take 405 and add it to another 405, you get 810. So, 405 plus 405 equals 810. Easy peasy lemon squeezy.
5% of 810= 5% * 810= 0.05 * 810= 40.5
17% of 810= 17% * 810= 0.17 * 810= 137.7
810
800
810
-77 + 77 = 0, and 0 + 76 = 76. You can take those two additions of 77 and 76, and add them together. 77 + 76 = 153, which is the answer.
0.33 * 76 = 25.08 or 10% of 76 = 7.6 * 3 = 22.8 (30%) 1% of 76 = 0.76 * 3 = 2.28 (3%) add together = 25.08
810
-8 + √76 (≈ 0.7178) and -8 - √76 (≈ - 16.7178)