Last year, I have written a tutorial on How to Solve Number Problems Mentally. This article has been turned into a math tutorial video in Youtube under the Sipnayan channel. Sipnayan is a Youtube Channel which contains math tutorial videos in Tagalog.
Embedded below are the three videos in the series.
Part 1 solves the following problem:
One number is 3 more than the other. Their sum is 45. What are the numbers?
Part 2 solves the following problem:
The sum of two numbers is 53. One number is 7 less than the other. What are the numbers?
Part 3 solves the following problem:
One number is twice the other number. Their sum is 45. What are the numbers?
Enjoy learning. If you have questions or comments, please type them below.