1. Calculează: a) 462 - (5 x 27 +21 x 4-5 x 16) = (23 x 5 + 153:9-11 X 6) + 122 x 0 = 1 149 + (56 x 9-27 x 15) - 794 = 674 + (224 x 4 - 32 x 18) - 189 = b) 3 601 – (84 x 21 + 630:14) = (17 x 23 + 26 x 24 + 53 x 9) - (172 x 6) = 1 848 - 567 + (276 x 2 + 15 x 18) + 10:10 = 1 249 +(45 x 6 - 84:3) - 620:5 =
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