If you have not gone through to the topic Multiplication by 11 , please read it before proceeding further.

Calculate 752 * 111

Solution

Step 1: Three ones are there in 111. So we have to keep adding maximum to the depth of three. So the digits in the answer will be 7 , 7+5 , 7+5+2, 5+2, 2

=> 7, 12, 14, 7, 2

Step 2: If the sum of digits is a two digit number, the left digit is considered as a carry digit, In this case, 1 is carry digit for 12 and 2 is written. 1 is carry digit for 14 and 4 is written. So this can be written as

7, 2(carry=1), 4(carry=1), 7, 2

Step 3: Carry digits will be added to its left digit.

=> 7+1, 2+1, 4, 7, 2

=> 8, 3, 4, 7, 2

Step 4: Yes, you have got the answer now . Just put these digits together.

i.e., the answer is 83472

Calculate 57 * 111

Solution

Step 1: Three ones are there in 111. So we have to keep adding maximum to the depth of three. Also to make 57 compatible with 3 digits, it is written as 057. So the digits in the answer will be 0 , 0+5 , 0+5+7, 5+7, 7

=> 0, 5, 12, 12, 7

Step 2: If the sum of digits is a two digit number, the left digit is considered as a carry digit, In this case, 1 is carry digit for 12 and 2 is written. So this can be written as

0, 5, 2(carry=1), 2(carry=1), 7

Step 3: Carry digits will be added to its left digit.

=> 0, 5+1, 2+1, 2, 7

=> 0, 6, 3, 2, 7

Step 4: Yes, you have got the answer now . Just put these digits together.

i.e., the answer is 06327 or 6327

Calculate 1257 * 1111

Solution

Step 1: Four ones are there in 1111. So we have to keep adding maximum to the depth of four. So the digits in the answer will be 1, 1+2 , 1+2+5, 1+2+5+7, 2+5+7, 5+7, 7

=> 1, 3, 8, 15, 14, 12, 7

Step 2: If the sum of digits is a two digit number, the left digit is considered as a carry digit, In this case, 1 is carry digit for 15 and 5 is written. 1 is carry digit for 14 and 4 is written. 1 is carry digit for 12 and 2 is written. So this can be written as

1, 3, 8, 5(carry=1), 4(carry=1), 2(carry=1), 7

Step 3: Carry digits will be added to its left digit.

=> 1, 3, 8+1, 5+1, 4+1, 2, 7

=> 1, 3, 9, 6, 5, 2, 7

Step 4: Yes, this is the answer . Just put these digits together.

i.e., the answer is 1396527.

__938*111__

9 (9+3) (9+3+8) (3+8) 8

9 (2, c=1) (0, c=2) (1, c=1) 8

10 4 1 1 8

i.e., 104118

6 (6+7) (6+7+5) (7+5+2) (5+2) 2

6 3(c=1) 8(c=1) 4(c=1) 7 2

7 4 9 4 7 2

Ans is 749472

111*1257 --- add those numbers

1257+12570+125700 ---- add one zero from the second digit of 111

suppose 11111*1257 ---- add those numbers

1257+12570+125700+1257000+12570000 ---- add one zero from the second digit of 11111

1 1+9 1+9+3 1+9+3+8 9+3+8+5 3+8+5+6 8+5+6+7 5+6+7+9 6+7+9 7+9 9

1 10 13 21 25 22 26 27 22 16 9

1 (c=1) 0 (c=1) 3 (c=2)1 (c=2) 5 (c=2) 2 (c=2) 6 (c=2) 7 (c=2)2 (c=1) 6 9

1+1 0+1 3+2 1+2 5+2 2+2 6+2 7+2 2+1 6 9

2 1 5 3 7 4 8 9 3 6 9

ie 21537489369 is the answer

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