Ivory has 2 times as many buttons as Nora. Nora has
37 as many buttons as Winnie. If the three of them have a total of 80 buttons, how many buttons does Winnie have?
Ivory |
Nora |
Winnie |
2x3 |
1x3 |
|
|
3x1 |
7x1 |
6 u |
3 u |
7 u |
The number of buttons that Nora has is repeated. Make the number of buttons that Nora has the same. LCM of 1 and 3 is 3.
Total number of buttons that the three of them have
= 6 u + 3 u + 7 u
= 16 u
16 u = 80
1 u = 80 ÷ 16 = 5
Number of buttons that Winnie has
= 7 u
= 7 x 5
= 35
Answer(s): 35