Resolva as seguintes expressões numéricas: a. 10+20-(7 . 9)+35÷7-13 b. 8+(6 . 5-49÷7)+41-37 c. -90+[(45-23 . 2+5).4] d. [25-81÷(21+36÷6)]-33 e. 29-...

a. 10+20-(7 . 9)+35÷7-13 = 10 + 20 - 63 + 5 - 13 = -41 b. 8+(6 . 5-49÷7)+41-37 = 8 + (30 - 7) + 4 = 35 c. -90+[(45-23 . 2+5).4] = -90 + [(45 - 46 + 5) . 4] = -90 + [4 . 4] = -74 d. [25-81÷(21+36÷6)]-33 = [25 - 81 ÷ (21 + 6)] - 33 = [25 - 81 ÷ 27] - 33 = [25 - 3] - 33 = -11 e. 29-23-{[4 .5 .(13-10).2]÷4}÷5 = 29 - 23 - [(4 . 5 . 3 . 2) ÷ 4] ÷ 5 = 29 - 23 - 30 ÷ 4 ÷ 5 = 29 - 23 - 1,5 = 4,5 f. 7+5-8+10 . (-24)÷3+9-3 = 7 + 5 - 8 - 8 + 9 - 3 = 2 g. 25+12-[12 . 9-2.(3+9)] = 25 + 12 - [108 - 2 . 12] = 25 + 12 - 84 = -47 h. [(-19+6-3 . 8)+24÷8+9]-10 = [-19 - 18 + 3] + 3 + 9 - 10 = -32 i. 17+13-32÷4+(19 . 2-64÷4)+7 . 5 = 17 + 13 - 8 + (38 - 16) + 35 = 89 j. [(9+15 . 3-49÷7)+42-8].2-30 = [(9 + 45 - 7) + 34] . 2 - 30 = 174 k. {84-[56+(3 . 8)÷(2+4+5+1)]}.2 = {84 - [56 + 24 ÷ 12]}.2 = {84 - [56 + 2]}.2 = 52 l. {81÷9.[15÷3-10+(49÷7+5.3)]}+5 = {9 . [5 - 10 + 12]}.2 + 5 = 59 m. 14+{5+9-[12 . 3+(21 . 5+17 . 3-108÷9)÷6]+4 . 9}-6 . 5 = 14 + {5 + 9 - [36 + (105 + 51 - 12)] ÷ 6 + 36} - 32 = 14 + 42 - 32 = 24