The main focus of 'Number Sense - II' is developing number sense and teaching students various strategies for subtracting numbers effectively.
Applying the same operations to both numbers in a subtraction sentence ensures that the result remains unchanged. It helps students understand how changes in one number affect the overall difference.
In 'Number Sense - II', students learn how to simplify complex subtraction problems by changing the subtrahend to ten. This technique makes it easier for them to solve challenging equations.