Предмет: Математика, автор: Аноним

1.Что лишнее.Почему? 800 руб. за тетрадь,600 руб. за ручку, 900 руб.
2.Одна сторона прямоугольника 4 см. Другая на 3 см длинее. Найти сумму длин всех сторон и площадь прямоугольника.ВАРИАНТЫ: 1)22см и 28 см2 2)22см и 12 см2 3) 14 см и 28см2
3.длина огорода прямоугольной формы 12 м,ширина в 2 раза короче. найти площадь огорода. ВАРИАНТЫ:1) 72 м2 2) 72 см2 3) 36 м2
ПОМОГИТЕ НЕ СДЕЛАЛА ЗАДАНИЯ В ТЕСТЕ СРОЧНО!!!!!!!!!

Ответы

Автор ответа: Vlad0231
0
в первом я думаю что 900 рублей лишнее ( потому что в других вариантах есть то за что отдаются эти деньги ). во втором : 4*2+2*(4+3)=22 периметр и площадь = 4*(3+4)=28 , то есть ответ 1. в третьем : 12*(12/2)=72м2 то есть ответ 1.
Автор ответа: Аноним
0
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