Question

4 класс МАТЕМАТИКА ПОМОГИТЕ ПОЖАЛУЙСТА!!!!Марійка збиралася в подорож. Зібрала у велику валізунайнеобхідніші речі, але не змогла підняти. Довелося полови-ну речей викласти. Скільки важать найнеобхідніші Марійчиніречі? Скільки важить валіза, якщо повна валіза важила 7 кг,а заповнена наполовину — 4 кг 500 г?​

Answer 1

Ответ:

Якщо повна валіза мала вагу 7кг а заповнена на половину 4.5кг, то різниця дорівнює 7-4.5 = 2.5кг.Марійка виклала 2.5кг.Це значить, що валіза має вагу 4.5-2.5 = 2 кг.Ну а речей, відповідно, 2.5 кг

Answer 2

#### Problem Analysis The problem states that Mariyka packed her essential items in a large suitcase but couldn't lift it. She had to remove half of the items from the suitcase. We need to find the weight of Mariyka's essential items and the weight of the suitcase when it was full and when it was half full. #### Solution Let's break down the problem step by step: 1. We know that the full suitcase weighed 7 kg. 2. We also know that the half-full suitcase weighed 4 kg 500 g. To find the weight of Mariyka's essential items, we need to subtract the weight of the suitcase from the weight of the half-full suitcase. #### Calculation To calculate the weight of Mariyka's essential items, we subtract the weight of the half-full suitcase from the weight of the full suitcase: Weight of Mariyka's essential items = Weight of full suitcase - Weight of half-full suitcase Let's perform the calculation: Weight of Mariyka's essential items = 7 kg - 4 kg 500 g To subtract the weights, we need to convert the weight of the half-full suitcase to the same unit as the full suitcase. Let's convert 500 g to kg: 500 g = 0.5 kg Now we can perform the subtraction: Weight of Mariyka's essential items = 7 kg - (4 kg + 0.5 kg) Weight of Mariyka's essential items = 7 kg - 4.5 kg Weight of Mariyka's essential items = 2.5 kg Therefore, Mariyka's essential items weigh 2.5 kg. To find the weight of the suitcase, we can subtract the weight of Mariyka's essential items from the weight of the full suitcase: Weight of the suitcase = Weight of full suitcase - Weight of Mariyka's essential items Weight of the suitcase = 7 kg - 2.5 kg Weight of the suitcase = 4.5 kg Therefore, the suitcase weighs 4.5 kg. #### Answer Mariyka's essential items weigh **2.5 kg** and the suitcase weighs **4.5 kg**. I hope this helps! Let me know if you have any further questions.