Question

Математика 3 клас, у бочці було 90л води. Спочатку в бочку долили 1|3 тієї кількості, що в ній була,а потім відлили половину всієї води. Скільки води залишилося в бочці?

Answer 1

90:3=30л- 1\3
90+30=120л- стало.
120:2=60л
120-60=60л залишилося

Answer 2

Problem Analysis

We are given that there was initially 90 liters of water in a barrel. Then, 1/3 of the amount of water that was in the barrel was added to it. Finally, half of the total amount of water in the barrel was poured out. We need to determine how much water is left in the barrel.

Solution

Let's break down the problem step by step:

1. Initially, there were 90 liters of water in the barrel. 2. Then, 1/3 of the amount of water that was in the barrel was added to it. This means an additional (1/3) * 90 = 30 liters of water was added. 3. The total amount of water in the barrel after the addition is 90 + 30 = 120 liters. 4. Next, half of the total amount of water in the barrel was poured out. This means (1/2) * 120 = 60 liters of water was poured out. 5. The amount of water left in the barrel is 120 - 60 = 60 liters.

Therefore, there are 60 liters of water left in the barrel.

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