276 P2.WN.JC.18121536
Level 3
Cindy bought 6 pens and sharpeners altogether. The mass of each pen was 3 g. The mass of each sharpener was 5 g. The pencils and sharpeners weigned 21 g in total.
  1. How many pens did Cindy buy?
  2. How many sharpeners did Cindy buy?
4 m
Guess & check
277 P3.WN.JC.17121082
Level 3
Mr Lee is 45 kg heavier than his son, Jake and 24 kg heavier then his daughter, Emerald. Given that their total mass is 252 kg, how much does Mr Lee weigh?
4 m
W 4 operations Mass Model Comparison Units method
278 P2.WN.ED.18011998
Level 3
Mrs Seng puts some toys in some similar bags. Find the mass of the empty bag.
4 m
W Addition & subtraction Mass Units & parts Substitution
279 P3.WN.JC.17121085
Level 3
The mass of a book is 580 g. It is 4 times as heavy as a notebook. What is the total mass of the book and the notebook?
4 m
W 4 operations Mass Model Times-as-many Units method
280 P2.WN.ED.18011916
Level 3
The mass of 2 packets of flour and a bag of rice is 9 kg. The mass of each packet of flour is 2 kg. The mass of a bag of rice is          .
4 m
W 4 operations Mass Units & parts Substitution

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