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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?
35, 45, 55, 65, ___
85
65
55
75

Q 2: What is the missing number?
30, 40, 50, 60, ___
50
70
60
80

Q 3: What is the missing number?
36, 46, 56, 66, ___
56
76
86
66

Q 4: What is the missing number?
19, 29, 39, 49, ___
39
49
59
69

Q 5: What is the missing number?
38, 48, 58, 68, ___
78
58
68
88

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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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