Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 5 | Maths
| Whole Numbers
2 Answers Below
Anyone can contribute an answer, even non-tutors.
Please help? Not allowed to use trial and error.
Date Posted: 3 years ago
Views: 457
See 2 Answers
I don’t understand the part of 19 x 15 = 285. Do I need to add together?
5 chicken is $18
3 pizza is $10
Common number of 3 and 5 are
15 , 30 , 45 , 60 , 75, 90, 85.....
15 chicken and 15 pizza would be
18×3 =54
10×5 =50
The price difference is 4
76÷4 = 19
19th common number of 3 and 5
Since the first common number is 15
We can find the 19th number as it is a multiple of 15
19×15 = 285
So the total number of pizza and chicken wing is 285
3 pizza is $10
Common number of 3 and 5 are
15 , 30 , 45 , 60 , 75, 90, 85.....
15 chicken and 15 pizza would be
18×3 =54
10×5 =50
The price difference is 4
76÷4 = 19
19th common number of 3 and 5
Since the first common number is 15
We can find the 19th number as it is a multiple of 15
19×15 = 285
So the total number of pizza and chicken wing is 285
Thank you!
360 Tutoring Program