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(17+27:9)×3+20-32:4+45:5=

Răspuns :

(17 + 3)×3+20-8+9=
20×3+20-8+9=
60+20-8+9=
80-8+9=
72+9=
81
(17+27:9)×3+20-32:4+45:5=
=(17+3)×3+20-32:4+45:5=
=20×3+20-8+9=
=60+20-8+9=
=80-8+9=
=72+9=
=81