Exercices et devoirs de maths et physique-chimie sur mesure pour le collège et le lycée

Un laboratoire réalise un élevage de bactéries. À 9h on commence avec 100 bactéries.
Leur nombre triple toutes les heures.
Créer un programme qui demande le nombre d'heures que l'on va attendre après le début de l'expérience.
Le programme devra afficher le nombre de bactéries après cette durée.

{"options": {"blocks": {"base_setvar": {"previous_statement": true, "next_statement": true, "colour": 330, "tooltip": "Affecter une valeur \u00e0 une variable", "inputs": [{"type": "value_input", "fields": [{"text": "mettre", "type": "text"}, {"name": "var_name", "default": "x", "type": "variable"}, {"text": "\u00e0", "type": "text"}], "align": "left", "name": "value", "check": null}]}, "base_repeattimes": {"previous_statement": true, "next_statement": true, "colour": 120, "tooltip": "Execute une suite d'instructions un certain nombre de fois", "inputs": [{"type": "value_input", "fields": [{"text": "R\u00e9p\u00e9ter", "type": "text"}], "align": "left", "name": "ntimes", "check": "Number"}, {"type": "dummy_input", "fields": [{"text": "fois", "type": "text"}], "align": "left"}, {"type": "statement_input", "fields": [], "align": "left", "name": "code_repeat", "check": null}], "inline": true}, "base_numberinput": {"output": "Number", "colour": 260, "tooltip": "Fourni un nombre", "inputs": [{"type": "dummy_input", "fields": [{"name": "value", "default": 0.0, "type": "number_input"}], "align": "left"}]}, "base_simplecalculus": {"output": "Number", "colour": 260, "tooltip": "Effectue un calcul simple", "inputs": [{"type": "value_input", "fields": [], "align": "left", "name": "value_1", "check": "Number"}, {"type": "dummy_input", "fields": [{"name": "op", "values": [["+", "PLUS"], ["-", "MINUS"], ["\u00d7", "TIMES"], ["\u00f7", "DIV"]], "type": "dropdown"}], "align": "left"}, {"type": "value_input", "fields": [], "align": "left", "name": "value_2", "check": "Number"}], "inline": true}, "simple_input_output_readnumber": {"output": true, "colour": 160, "tooltip": "Demander un nombre \u00e0 l'utilisateur", "inputs": [{"type": "dummy_input", "fields": [{"text": "demander un nombre", "type": "text"}], "align": "left"}]}, "base_varvalue": {"output": true, "colour": 330, "tooltip": "Fourni la valeur d'une variable", "inputs": [{"type": "dummy_input", "fields": [{"name": "var_name", "default": "x", "type": "variable"}], "align": "left"}]}, "base_start": {"next_statement": true, "colour": 65, "tooltip": "D\u00e9marrage de l'algorithme", "inputs": [{"type": "dummy_input", "fields": [{"text": "Au d\u00e9marrage", "type": "text"}], "align": "left"}], "creatable": false, "on_event": "start"}, "simple_input_output_print": {"previous_statement": true, "next_statement": true, "colour": 160, "tooltip": "Afficher une valeur", "inputs": [{"type": "value_input", "fields": [{"text": "Afficher", "type": "text"}], "align": "left", "name": "value", "check": null}]}}, "toolbox": [{"type": "base_numberinput"}, {"type": "base_repeattimes"}, {"type": "base_setvar", "var_name": "bact\u00e9ries"}, {"type": "base_setvar", "var_name": "heures"}, {"type": "base_simplecalculus"}, {"type": "base_varvalue", "var_name": "bact\u00e9ries"}, {"type": "base_varvalue", "var_name": "heures"}, {"type": "simple_input_output_print"}, {"type": "simple_input_output_readnumber"}]}, "ast": [[{"type": "base_start", "deletable": false, "editable": false}]]}

Pour accéder à cet exercice, il faut être connecté.