How to solve a 2-Step word problem using RUCSAC

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How to solve a 2-Step word problem using RUCSAC

• By Kye and Nina

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A car driver fills his car with 38 litres of
petrol, which costs 98p per litre. He then uses
8 litres of petrol on his next journey. What is
the total value of petrol left in his car after?

Step one Read the problem
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Step two Understand the problem

• A car driver fills his car with 38 litres of
  petrol, which costs 98p per litre. He then uses
  8 litres of petrol on his next journey. What is
  the total value of petrol left in his car after?

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Step three Choose the number operation

• He fills the car with 38 litres. He uses 8 litres
  from his last journey and it costs 98p per litre,
  so you need to work out
• 38 x 0.98

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Step four Solve the problem

• 
  30 8
• 
  90 2700 720
• 2700
• 720
• 240
• 64
• 37.24
• 
  8 240 64
• The answer is 37.24 but we still have to take
  away the cost of 8 litres, so
• 37.24 - 7.84 29.40

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Step five Check your work
The Answer is 29.40.
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Thank you for watching