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Date:___________________

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Grade 2 - Mathematics
1.42 Adding and Subtracting 9 Mentally

Method:
  1. Read out the equations given.
  2. 9 can be written as 10-1.
Example: 43-9
We can write this as 43-10+1
Answer : 34.

Example: 53+9
We can write this as 53+10-1
Answer : 62


Directions: Find the missing number. Also write atleast 5 examples of your own.

Name: ___________________

Date:___________________

Grade 2 - Mathematics
1.42 Adding and Subtracting 9 Mentally

Q 1: 71 + 9 = ? (Hint: 71+10-1)
82
80
81
79

Q 2: 38 + 9 = ? (Hint: 38+10-1)
46
48
47
49

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