Mrs Tan cuts 2780 cm of ribbon equally into 15 pieces for gift bags. How long is each piece?
- 185 13 cm
- 185 cm
- 185 15 cm
- 186 cm
Need a hint?
Divide 2780 by 15. Then share the centimetres left over equally among the 15 pieces.
Worked answer
- 2780 ÷ 15: 15 × 185 = 2775.
- 2780 − 2775 = 5 cm is left over.
- The 5 cm is shared among the 15 pieces: 5 ÷ 15 = 515 = 13 cm each.
- Each piece is 185 13 cm long.
Answer: 185 13 cm
The mistake this question tests
Habit
Fraction of a remainder
Some pupils may ignore the 5 cm left over and answer 185 cm. Others may simplify 515 incorrectly as 15.
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