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Grade 1 - Mathematics
2.9 Counting by 10

Method:
  1. Read out the numbers given.
  2. Notice the pattern in the sequence of numbers.
  3. Guess the number that should come next.
Example

5, 15, 25, 35,___
Look at the numbers in the above sequence. Here the difference between one number to the next is 10, therefore, it is skip counting by 10. That is, to each number we add 10 to get the next number.
In the above example,
15 - 5 = 10
25 - 15 = 10
35 - 25 = 10
Hence, to each number we add 10 to get the next number.

Answer: 45


Directions: Find the missing number. Write 5 examples and show your work.
Q 1: What is the missing number?
3, 13, 23, 33, ___
43
33
23
53

Q 2: What is the missing number?
12, 22, 32, 42, ___
52
42
32
62

Q 3: What is the missing number?
18, 28, 38, 48, ___
38
68
58
48

Q 4: What is the missing number?
0, 10, 20, 30, ___
50
20
40
30

Q 5: What is the missing number?
36, 46, 56, 66, ___
86
76
56
66

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Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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