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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?
10, 20, 30, 40, ___
60
50
30
40

Q 2: What is the missing number?
25, 35, 45, 55, ___
75
45
65
55

Q 3: What is the missing number?
22, 32, 42, 52, ___
42
52
62
72

Q 4: What is the missing number?
33, 43, 53, 63, ___
53
83
73
63

Q 5: What is the missing number?
8, 18, 28, 38, ___
48
28
58
38

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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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