Decimals - ordering and rounding

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Decimals - ordering and rounding

• Jot down a two-digit number, for example, 43
• Double the tens digit (8) and add 5 times the
  units digit (15) giving (8 15 ) 23.
• Double the tens digit (4) and add 5 times the
  units digit (15) giving (4 15 ) 19.
• Keep repeating these steps.
• What do you notice?
• Investigate other starting numbers.