Question

elimine os parenteses, colchetes e chaves

a) 52 - {12 + [15-(8-4)]} =
b) {[(18-3) + (7+5) - 2] + 5} - 12 =
c) 45+{15-[(10-8) + (7-4) - 3] -4}
d) 40 + {50 - [35 - (25+5) - 1 ]} + 7
e) 38 - {20 - [22 - (5+3) + (7-4+1)]} =

Answer 1

Resposta:

a) 52-{12+[15-4]}=

52-{12+11}=

52-23=

29

b) {[15+12-2]+5}-12=

{[27-2]+5}-12=

{25+5}-12=

30-12=

18

c) 45+{15-[2+3-3]-4}=

45+{15-[5-3]-4}=

45+{15-2-4}=

45+{13-4}=

45+9

54

d) 40+{50-[35-30-1]}+7=

40+{50-[5-1]}+7=

40+{50-4}+7=

40+46+7=

86+7=

93

e) 38-{20-[22-8+(3+1)]}=

38-{20-[22-8+4]}=

38-{20-[14+4]}=

38-{20-18}=

38-2=

36

Espero ter ajudado.