Page 60 - Math Genius C4

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\ 30-Sep-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Example 1: Find 937 × 506. Example 2: Find 804 × 590.
Solution: Solution:

L tth th H t O L tth th H t O
9 3 7 8 0 4

× 5 0 6 500 + 0 + 6 × 5 9 0 500 + 90 + 0
5 6 2 2 937 × 6 7 2 3 6 0 804 × 90
0 0 0 0 937 × 0 + 4 0 2 0 0 0 804 × 500

+ 4 6 8 5 0 0 937 × 500 4 7 4 3 6 0 Product
4 7 4 1 2 2 Product Thus, 804 × 590 = 474360.

Thus, 937 × 506 = 474122.

maths fun
Play in a pair. One person will roll 3 dice together and form the greatest Collaborative Learning

and the smallest 3-digit numbers using the outcomes on
the dice. The other partner will now multiply the numbers
so obtained. Now, the partners will change their roles. The
second partner will roll 3 dice together and form the greatest
and smallest 3-digit numbers. The first partner will now
multiply the numbers so obtained. Repeat the process. The
partner who gives more correct answers will win.

Practice Time 3C

Find the product of the following.

1. 325 × 249 2. 709 × 413 3. 372 × 165 4. 248 × 403
5. 273 × 304 6. 504 × 332 7. 555 × 125 8. 589 × 251

Multiplication by a nuMber enDing WitH Zero

Abdul and his sister Zoya want to buy sweets.

Abdul’s mother gave him 5 notes of `100. Think Tank
Zoya: How much money did Mother give you? Find two different pairs of
3-digit numbers whose product
Abdul: Mother gave me `500. is the same?
Zoya: How do you calculate it so quickly?

Abdul: I will explain the concept behind this to you with the help of examples.
To get the product of a number with another number which has zeros at the end,
we first multiply the two numbers without the zeros.

Then, count the number of zeros and place that number of 100 × 5 = 500
zeros with the product so obtained. 1 × 5

58 Mathematics-4