11 P6.ST.JC.18121307
Level 2
Find the value of 1 unit.
  1. 5 u - 20 = 1 u - 8
  2. 1 u - 8 = 5 u - 20
  3. 8 - 1 u = 20 - 5 u
  4. 20 - 5 u = 8 - 1 u
4 m
W 4 operations Units method Units equations
12 P6.PC.NK.21060207
Level 3 PSLE
Ronnie had blue pens and red pens for sale. He sold 240 blue pens. 25% of the pens sold were red.
  1. How many blue pens and red pens did Ronnie sell altogether?
  2. He sold 40% of his pens. 70% of the pens left unsold were blue. How many red pens did Ronnie have at first?
4 m
Percent to units Percent of different bases All change Units table
13 P6.ST.JC.18121308
Level 2
Find the value of 1 unit.
  1. 6 u - 15 = 1 - 2 u
  2. 1 - 2 u = 6 u - 15
  3. 5 u - 2 = 14 - 3 u
  4. 14 - 3 u = 5 u - 2
4 m
W 4 operations Units method Units equations
14 P6.PC.NK.21060206
Level 3 PSLE
A bookshop is having a book sale. The 1st book is at 10% discount. The 2nd book is at 20% discount. The price of the 2nd book should be equal or lower than the price of the 1st book.
  1. Kimmy's books were priced at $10 and $12. How much did she pay for them? 2 m
  2. Henry paid a total of $24.80 for his two books. He paid $4 more for the 1st book than for the 2nd book. What was the price of the 2nd book before discount? 3 m
5 m
Percent of a whole Discount Percent of different bases Money D 4 operations More than or less than Units table
15 P6.ST.JC.18121309
Level 2
Find the value of 1 unit.
  1. 7 u - 20 = 4 u + 10
  2. 4 u + 10 = 7 u - 20
  3. 4 u - 10 = 1 u + 20
  4. 1 u + 20 = 4 u - 10
4 m
W 4 operations Units equations

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