Ian and David have 11 beads altogether. Ian has 9 more beads than David. Find the number of beads each boy has.
- David
- Ian
Number of beads that David has = 1 u
Number of beads that Ian has = 1 u + 9
Total number of beads
= 1 u + 1 u + 9
= 2 u + 9
2 u + 9 = 11
2 u = 11 - 9 = 2
1 u = 2 ÷ 2 = 1
(a)
Number of beads that David has
= 1 u
= 1
(b)
Number of beads that Ian has
= 1 u + 9
= 1 + 9
= 10
Answer(s): (a) 1; (b) 10
