Десятичные дроби. Законы действий

object(ArrayObject)#863 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(83) "Урок №3 "Умножение десятичных дробей" по ФГОС "
    ["seo_title"] => string(50) "urok-3-umnozhieniie-diesiatichnykh-drobiei-po-fgos"
    ["file_id"] => string(6) "198902"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1428488190"
  }
}

object(ArrayObject)#885 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(152) "Презентация для урока математики 5 класса "Сложение и вычитание десятичных дробей" "
    ["seo_title"] => string(96) "priezientatsiia-dlia-uroka-matiematiki-5-klassa-slozhieniie-i-vychitaniie-diesiatichnykh-drobiei"
    ["file_id"] => string(6) "189488"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(11) "presentacii"
    ["date"] => string(10) "1426933099"
  }
}

object(ArrayObject)#863 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(76) "Деление положительных десятичных дробей."
    ["seo_title"] => string(43) "delenie_polozhitelnykh_desiatichnykh_drobei"
    ["file_id"] => string(6) "595258"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(12) "planirovanie"
    ["date"] => string(10) "1639842286"
  }
}

object(ArrayObject)#885 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(88) "Рабочая программа учебного  "Математика" 5 класс "
    ["seo_title"] => string(52) "rabochaia-proghramma-uchiebnogho-matiematika-5-klass"
    ["file_id"] => string(6) "154943"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(12) "planirovanie"
    ["date"] => string(10) "1421229369"
  }
}

object(ArrayObject)#863 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(81) "Рабочая программа по математике 5 класс.ФГОС"
    ["seo_title"] => string(51) "rabochaia-proghramma-po-matiematikie-5-klass-fgos-4"
    ["file_id"] => string(6) "276700"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(12) "planirovanie"
    ["date"] => string(10) "1452777737"
  }
}