(i) 38 x 9
Ans: 38 x 9 = 342
(ii) 80 x 5
Ans: 80 x 5 = 400
(iii) 53 x 8
Ans: 53 x 8 = 424
(i) 4,032 by 198
Ans:
= 4,032 x 198 = 798336
(ii) 3,647 by 245
Ans:
= 3,647 x 245 = 893515
(iii) 501 by 123
Ans:
= 501 x 123 = 61623
(i) 2,586 x ______ = 2,586
Ans: 2,586 x 1 = 2,586
(Identity Property: The product of any number with 1 is as same as the number itself.)
(ii) 624 x ______ = 38 x 624
Ans: 624 x 38 = 38 x 624
(Commutative property of multiplication is a math rule that says you can multiply numbers in any order, and the result will be the same.)
(iii) 600 x ______ = 0.
Ans: 600 x 0 = 0
(Zero property of multiplication is a fundamental rule in mathematics that states that any number multiplied by zero is equal to zero.)
(i) 13,528
Ans: Here's the general rule for rounding:
Therefore, applying these rules, we get:
13,528 = 13,530
(ii) 3,542
Ans: Here's the general rule for rounding:
Therefore, applying these rules, we get:
3,542 = 3,540
(iii) 174
Ans: Here's the general rule for rounding:
Therefore, applying these rules, we get:
174 = 170
(i) 52 x 43
Ans: Here's the general rule for rounding:
Therefore, applying these rules, we get:
52 x 43 = 50 x 40 = 2000
(ii) 63 x 52
Ans: Here's the general rule for rounding:
Therefore, applying these rules, we get:
63 x 52 = 60 x 50 = 3000
(i) 995 x 995 ______.
Ans: 990,995
(ii) 705 x 705 ______.
Ans: 497,025
(iii) 499 x 491 ______.
Ans: 245,009
(i) Find the product of the placevalues of 6 in 6,965 ______.
Ans: The place value of 1st 6 in 6,965 is at thousand's place.
=> First place value of 6 = 6000
The place value of 2nd 6 in 6,965 is at ten's place.
=> Second place value of 6 = 6000
Product of the place values of 6 in the number 6,965 = 6000 x 60 = 360000
(ii) Find the product of the greatest 2digit number and the smallest 4digit number ______.
Ans: Greatest 2digit no. = 99
Smallest 4digit no. = 1000
Therefore, the product of the greatest 2digit number and the smallest 4digit number = 1000 x 99 = 99000.
(iii) A transistor costs Rs. 1,642. Find the cost of 95 such transistors.
Ans: Cost of one Transistor = Rs 1,642
Total number of transistors = 95
Cost of 95 Transistors = 1642 x 95 = 155,990
(iv) A candle factory produced 814 candles in a day. How many candles will this factory produce in a year?
Ans: A candle factory produces candles in a day = 814
Total number of days in a leap year = 365
Candles this factory will produce in one year = 814 x 365 = 2,97,110
(v) A farmer produced 735 quintals of rice. He sold it at the rate of Rs 1525 per quintal. How much money did he get?
Ans: A farmer produced rice = 735 quintals
Cost per quintal = Rs. 1525
Money he got = 1525 x 735 = Rs. 1,120,875
(vi) The cost of a pack of Ghee is Rs. 308 Find the cost of 97 such packs.
Ans: The cost of 1 pack of Ghee = Rs. 308
Total number of packs = 97
Therefore, Total Cost of 97 packs of Ghee = 308 x 97 = 29,876
30 videos64 docs19 tests

1. How do you multiply twodigit numbers using the column method? 
2. Can you explain the concept of carrying over while multiplying twodigit numbers? 
3. How can the distributive property be applied to multiplication of twodigit numbers? 
4. What are some strategies to help children memorize multiplication tables? 
5. How can parents support their children in learning multiplication at home? 

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