Сравнение десятичных дробей
Важно знать, что дробь 0,3 и дробь 0,30 равны друг другу. Нули, приписанные в конце десятичной дроби, не меняют ее величины, и на координатном луче они будут располагаться в одной точке.
При сравнении десятичных дробей в первую очередь сравниваем целые части (расположены слева от запятой).
Например:
Если целые части равны тогда сравниваем дробные части
Если число символов после запятой у сравниваемых дробей не совпадает, тогда к дроби с меньшим количеством символов приписываем нули и сравниваем получившиеся числа дробных частей.
Сравним 7,5 и 7,47. Припишем нуль 7,50 и 7,47.
Как и натуральные числа, меньшие десятичные дроби на координатном
луче лежат левее, чем большие.
Вопросы к конспектам
Запишите числа в виде правильного двойного неравенства: х=18,6; у=0,186; z=1,86
Запишите числа в порядке возрастания: ![1 1 fifth semicolon space space space 1 comma 5 semicolon space space space 1 3 over 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Сравните числа 2,4 и 3,2:
Сравните числа 67,83 и 67,25:
Последнее изменение: Среда, 8 Март 2017, 00:16