PSLE For a recycling project, Ethan collected 12 metal cans, Billy collected 4
d metal cans and Tommy collected 8 +
d metal cans.
- How many more metal cans did Billy collect than Tommy?
- How many metal cans did the 3 boys collect altogether?
(a)
Number of metal cans that Billy collected more than Tommy
= 4
d - (8 +
d)
= 4
d -
d - 8
= 3
d - 8
(b)
Total number of metal cans that the 3 boys collected
= 12 + 4
d + 8 +
d = 12 + 8 + 4
d +
d = 20 + 5
d Answer(s): (a) 3
d - 8; (b) 20 + 5
d