Предмет: Математика, автор: ggmiool23

даю 40 балов тест по математике
1.Найдите 0,2 от 31
1.найдите дробь 3 4 от числа суммы (40+80)
3.от рулона материи в котором было 120 м сначала дробь 2 5ятых а потом 3 4 ётых остатка.сколько материи осталось в рулоне

ggmiool23: пожалуйста ответьте

Ответы

Автор ответа: kurmanjantemirova

Ответ:1)6.2 2)90 3)18

Пошаговое объяснение:

1) 31*0.2=6.2

2) 3/4*(40+80)=3/4*120=90

3) 120*2/5=48

120-48=72

72*3/4=54

72-54=18

ggmiool23: помоги пожалуйста ещё с этим

ggmiool23: ДАЮ 30 БАЛОВ
1.Найдите число 0,3 которого равны 45
2.РЕШИТЬ задачу.В первый день турист прошёл 12 км что составило 0,4 маршрута.Какова длина всего маршрута,
если можно то с краткой записью задачу (необязательно)

Автор ответа: rakhimjanov2004

1) 6,2
2) 90
3) 120:5*2=48 отрезали
120-48=72 осталось
72:4*3=54 отрезали
72-54=18 осталось

Приложения:

ggmiool23: ты что забылы

ggmiool23: ф мальчик

ggmiool23: тебя жи зовут случйно не Амалия

rakhimjanov2004: Нет

rakhimjanov2004: Я узбечка и ты наверное ошибся

ggmiool23: а да наверное поможешь мне решить

rakhimjanov2004: Если не сложно отметь мой лучшим ответом пожалуйста

ggmiool23: ок

ggmiool23: щас попробую кинуть ссылку

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