Ivan had
110 as many buttons as Luis. Luis had twice as many buttons as Sean. If Ivan had 172 buttons fewer than Sean,
- how many buttons did Ivan have?
- how many buttons did they have altogether?
(a)
Number of buttons that Ivan had = 1 u
Number of buttons that Luis had = 10 u
Number of buttons that Sean had = 10 u ÷ 2 = 5 u
Number of buttons that Ivan had fewer than Sean
= 5 u - 1 u
= 4 u
4 u = 172
1 u = 172 ÷ 4 = 43
Number of buttons that Ivan had
= 1 u
= 43
(b)
Total number of buttons that they had
= 1 u + 10 u + 5 u
= 16 u
= 16 x 43
= 688
Answer(s): (a) 43; (b) 688
