Question

2. Resolva as operações com números decimais.

a) 2,4 + 0,001 =

b) −4,421 + 50,2 − 8,503 =

c) −7,321 − 0,2 + 90,456 =

d) −0,2 ⋅ 0,88 =

e) 0,11 ⋅ 30,51 ⋅ 0,02 =

f) [(−0,22 + 87,71) ⋅ 0,02] ÷ 0,9 =

g) [(1,44 − 9,081) ÷ 0,009] ÷ 40 =​

Answer 1

Resposta:

a) 2,4 + 0,001 = 2,401

b) −4,421 + 50,2 − 8,503 = =(-8,503-4,421)+50,2=-12,924+50,000=

=37,076

c) (−7,321 − 0,2 )+ 90,456 = 82,479

d) −0,2 ⋅ 0,88 = 0,68

e) 0,11 ⋅ 30,51 ⋅ 0,02 = 3,3571×0,02=0,067122

f) [(−0,22 + 87,71) ⋅ 0,02] ÷ 0,9 = [87,49×0,02]÷0,9=

=1,7498÷0,9=1,9442

g) [(1,44 − 9,081) ÷ 0,009] ÷ 40 = [-7,641÷0,009]÷40=

=-849÷40=-21,225