Nora has 4 times as many buttons as Joelle. Joelle has
45 as many buttons as Emma. If the three of them have a total of 275 buttons, how many buttons does Emma have?
Nora |
Joelle |
Emma |
4x4 |
1x4 |
|
|
4x1 |
5x1 |
16 u |
4 u |
5 u |
The number of buttons that Joelle has is repeated. Make the number of buttons that Joelle has the same. LCM of 1 and 4 is 4.
Total number of buttons that the three of them have
= 16 u + 4 u + 5 u
= 25 u
25 u = 275
1 u = 275 ÷ 25 = 11
Number of buttons that Emma has
= 5 u
= 5 x 11
= 55
Answer(s): 55