Alright, let's break down the given problems step by step and decide on the best methods to solve each one.
1. Converting hours to minutes for fencing:
- We know that fencing took 4 hours.
- To convert hours to minutes, we multiply the number of hours by 60 (since there are 60 minutes in an hour).
- So, we need to calculate [tex]\(4 \times 60\)[/tex].
Since multiplying by 60 involves basic multiplication and is a straightforward calculation, we can indeed use mental math here. Performing the calculation:
[tex]\[ 4 \times 60 = 240 \][/tex]
So, it took 240 minutes to reach the record for fencing.
2. Converting metres to centimetres for the shot put record:
- The given distance for the shot put is 27 metres.
- To convert metres to centimetres, we multiply the number of metres by 100 (since there are 100 centimetres in a metre).
- So, we need to calculate [tex]\(27 \times 100\)[/tex].
Since this involves multiplying by 100, which can be quite efficiently done using basic arithmetic, it can be performed using paper and pencil for clarity and accuracy. Performing the calculation:
[tex]\[ 27 \times 100 = 2700 \][/tex]
So, the shot put record is 2700 centimetres.
Therefore, the detailed solutions are:
- It took 240 minutes to reach the record for fencing.
- The shot put record is 2700 centimetres.
