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Grade 2 - Mathematics
1.42 Adding and Subtracting 9 Mentally
Method
:
Read out the equations given.
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.
Q 1
: 71 + 9 = ? (Hint: 71+10-1)
80
82
81
79
Q 2
: 23 + 9 = ? (Hint: 23+10-1)
33
35
32
31
Q 3
: 88 + 9 = ? (Hint: 88+10-1)
98
97
96
99
Q 4
: 61 - 9 = ? (Hint: 61-10+1)
50
53
51
52
Question 5: This question is available to subscribers only!
Question 6: This question is available to subscribers only!
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