PSLE At Billy's fruit stall,
34 of the dragonfruits were white and the rest were red. He sold
12 of the total number of dragonfruits.
45 of the dragonfruits sold were white. 45 red dragonfruits were left. How many white dragonfruits did Billy sell?
|
White |
Red |
Total |
Before |
3x5 = 15 u |
1x5 = 5 u |
4x5 = 20 u |
Change |
|
|
- 2x5 = - 10 u |
Comparing red dragonfruits and white dragonfruits sold |
- 4x2 = - 8 u |
- 1x2 = - 2 u |
- 5x2 = - 10 u |
After |
7 u |
3 u |
2x5 = 10 u |
The total number of dragonfruits is the same. Make the denominators of the total number of dragonfruits the same.
12 =
24The number of dragonfruits sold is the repeated identity. Make the number of dragonfruits sold the same. LCM of 2 and 5 is 10.
3 u = 45
1 u = 45 ÷ 3 = 15
Number of white dragonfruits that Billy sold
= 8 u
= 8 x 15
= 120
Answer(s): 120