Elizabeth and Alexander had a total of 100 erasers. Alexander had 4 times as many erasers as Elizabeth.
- How many erasers did Elizabeth have?
- How many erasers did Alexander have?
(a)
Number of erasers that Elizabeth had = 1 u
Number of erasers that Alexander had = 4 u
Total number of erasers
= 4 u + 1 u
= 5 u
5 u = 100
1 u = 100 ÷ 5 = 20
Number of erasers that Elizabeth had
= 1 u
= 20
(b)
Number of erasers that Alexander had
= 4 u
= 4 x 20
= 80
Answer(s): (a) 20; (b) 80