Skip counting by 11s

Skip counting by 11s means adding eleven to previous number or jump by 11. Each number is 11 more than the previous number. if the 1st number is an odd number then the next number after adding 11 will be an even number. And if the 1st number is an even number then the next number after adding 11 will be an odd number.
Example: Skip counting by 11s
If the 1st number is 7 then next 5 numbers obtained by counting by 11's are; 7, 7 + 11 =18; 18 + 11 =29; 29 + 11 = 40; 40 + 11 = 51; 51 + 11 =62
From this we can observe that when the number is even so after adding 11 to it we get an odd number and when the number is odd so after adding 11 we get an even number.
So next 5 numbers after 7 are 18,29,40,51,62.

Example 1 : Find the next 3 numbers after 24 by counting it by 11's.
Solution : 1st number = 24 + 11 = 35
2nd number = 35 + 11 = 46
3rd number = 46 + 11 = 57
So next 3 numbers after 24 are : 35,46,57.

Example 2 : Find the missing numbers. 15,26,____,____,____,____.
Solution : 1st number is 15 and next number is 26 so from this we can see that its counting by 11's
. That means after adding 11 to previous number we will get the next number. So,
1st missing number = 26 + 11 =37
2nd missing number = 37 + 11 = 48
3rd missing number = 48 + 11 = 59
4th missing number = 59 + 11 = 70
So the number are 15,26,37,48,59,70.

Example 3 : Complete the following pattern.
12,23,34,____,____,____
Solution : In 12,23 and 34 the gap of 11. That means by adding 11 we get a next number. So, 1st missing number is 34 + 11 = 45, 2nd missing number is 45 + 11 =56 and 3rd missing number is 56 + 11 = 67. Series is 12,23,34,45,56,67.

Skip counting by 11s table

I Using the above table, fill in the blanks.
1) 11 x 3 = ---------    2) 11 x 8 = ---------     3) 11 x 6 = ---------   

4) 11 x 9 = ---------    5) 11 x 1 = ---------    6) 11 x 2 = ---------    

7) 11 x 5 = ---------    8) 11 x 6 = ---------    9) 11 x 7 = ---------

II Complete the following counting by 4's:
1) 1,12,33,44,___, ____,_____,_____,_____.

2) 32,43,54,65,___, ____,_____,_____,_____.

3) 70,81,92,103,___, ____,_____,_____,_____.

4) 65,76,87,98,___, ____,_____,_____,_____.

Answers

I
1) 33      2) 88     3) 66      4) 99   
5) 11     6) 22     7) 55     8) 66   
9) 77

II
1)55,66,77,88,99.

2) 76,87,98,109,120.

3) 114,125,136,147,158.

4) 109,120,131,142,153.

2nd Grade Math

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