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\ 07-Nov-2024 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Solution: (a) An example of adding two 4-digit numbers to get a sum greater than 50,000 is not
possible because 9,999 + 9,999 = 19,998 < 50,000

(b) An example of adding two 5-digit numbers to get a 6-digit number is possible as
84,952 + 24,547 = 1,09,499

(c) An example of adding a 6-digit number to a 3-digit number to get a 7-digit number
is possible as 9,99,875 + 457 = 10,00,332
(d) An example of subtracting two 5-digit numbers to get a 3-digit number is possible
as 42,952 – 42,547 = 405.
(e) An example of subtracting a 3-digit number from a 5-digit number to get 4000 is not
possible because 10,000 – 999 = 9,001 > 4000.

create and solve
Tarsia Puzzle
In mathematics, puzzle always work as a supplement to make mathematics teaching a fun-loving experience.
Tarsia puzzle is a fun engaging activity where students engage themselves and learn in collaboration with peers.
The puzzle is designed on geometrical shapes such as triangles, hexagons and an equation or the question is
written on one side of a polygon, and the answer is on another side of the polygon. The sides of two polygons
are joined in such a way that one side shows the question, and answer on the adjacent or overlapping side by
cutting each polygonal shape separately.
Example Solution

Practice Time 3E

1. Write an example for each of the below scenarios whenever possible.
(a) 5-digit number + 5-digit number = sum greater than 95,000

(b) 5-digit number + 4-digit number = a 6-digit number
(c) 6-digit number – 2-digit number = a 5-digit number
(d) 4-digit number – 3-digit number = a difference less than 100

(e) 5-digit number – 4-digit number = 64,500

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