The document contains a series of mathematical expressions to be calculated and solved. There are 11 expressions involving operations like addition, subtraction, multiplication, division, and order of operations with parentheses and brackets. The task is to calculate the value of each expression and write the solution in the provided space.

1. 1) Calcule o valor das expressões numéricas abaixo e resolva-as na folha seguinte:
a) 12 : 6 + 2 x 9 – 3 =
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b) 9 x 9 + 18 : 3 – 8 =
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c) 81 : 9 + 5 x 7 – 4 =
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d) 32 x 15 – 240 : 12 =
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e) 176 : 8 + 75 x 3 + 1 =
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f) 66 : 3 + 9 x 3 – 10 =
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g) 105 x 4 – 40 : 8 + 3 =
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h) 192 : 2 – 47 x 2 + 4 =
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i) 12 x 4 + 8 : 2 + 7 x 3 =
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j) 36 + 2 x { 25 + [ 18 – ( 5 – 2 ) x 3 ] } =
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k) { 230 – 3 x [ 24 – (25 – 13 ) : ( 5 + 1 ) ] – 24 : 3 } : ( 14 – 8) =
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l) 226 : 2 – 9 x 8 + 2 =
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