Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 5 | Maths
| Fractions
One Answer Below
Anyone can contribute an answer, even non-tutors.
Help
Date Posted: 2 years ago
Views: 678
After :
Tarts → ⬛⬛⬛ (3 units)
Buns → ⬛ (1 unit)
Before :
Tarts → ⬛⬛⬛ + 15
Buns → ⬛ + 90
Now for the 'Before' case, there were twice as many Buns as Tarts.
So twice the number of tarts
= 2 × (⬛⬛⬛ + 15)
= ⬛⬛⬛⬛⬛⬛ + 30
This means that :
⬛⬛⬛⬛⬛⬛ + 30 = ⬛ + 90
Comparing the two,
90 - 30 = 60
⬛⬛⬛⬛⬛⬛ - ⬛ = ⬛⬛⬛⬛⬛
So ⬛⬛⬛⬛⬛ = 60
⬛ = 60 ÷ 5 = 12
Tarts baked at first
= ⬛⬛⬛ + 15
= 12 × 3 + 15
= 36 + 15
= 51
Tarts → ⬛⬛⬛ (3 units)
Buns → ⬛ (1 unit)
Before :
Tarts → ⬛⬛⬛ + 15
Buns → ⬛ + 90
Now for the 'Before' case, there were twice as many Buns as Tarts.
So twice the number of tarts
= 2 × (⬛⬛⬛ + 15)
= ⬛⬛⬛⬛⬛⬛ + 30
This means that :
⬛⬛⬛⬛⬛⬛ + 30 = ⬛ + 90
Comparing the two,
90 - 30 = 60
⬛⬛⬛⬛⬛⬛ - ⬛ = ⬛⬛⬛⬛⬛
So ⬛⬛⬛⬛⬛ = 60
⬛ = 60 ÷ 5 = 12
Tarts baked at first
= ⬛⬛⬛ + 15
= 12 × 3 + 15
= 36 + 15
= 51
See 1 Answer
See main comments for working and explanation.
360 Tutoring Program