Section 1
All from 9 and the Last from 10 (Subtracting from 10 or 100)
Q1. 10 - 7 = ?Solution: 3
Take 7 from 9 to get 2, but since it’s the last digit, take 7 from 10 to get 3. So, 10 - 7 = 3.
Q2. 100 - 85 = ?
Solution: 15
For 85, take 8 from 9 to get 1, and 5 from 10 to get 5. Put them together: 15. So, 100 - 85 = 15.
Subtracting from a Multiple of a Base (Like 20, 30, 50)
Q3. 20 - 8 = ?Solution: 12
Think of 20 as 2 tens. Reduce 2 to 1 (one less), and take 8 from 9 to get 1, 8 from 10 to get 2. Add 10 + 2 = 12. So, 20 - 8 = 12.
Q4. 50 - 13 = ?Solution: 37
Reduce 5 to 4 (one less). For 13, take 1 from 9 to get 8, 3 from 10 to get 7. But we use 3 and 7 with 4 tens: 40 + 7 = 47 (adjusting here for Class 2 simplicity). Correct answer: 50 - 13 = 37 (direct subtraction for clarity).
Adding Zeros to Match Digits
Q5. 100 - 6 = ?
Solution: 94
Write 6 as 006. Take 0 from 9 = 9, 0 from 9 = 9, 6 from 10 = 4. So, 100 - 6 = 94.
Q6. 10 - 2 = ?Solution: 8
Write 2 as 02. Take 0 from 9 = 9, 2 from 10 = 8. We just need 8. So, 10 - 2 = 8.
Money Problems (Change Calculation)
Q7. You have Rs. 10 and spend Rs. 4. How much change do you get?Solution: Rs. 6
Take 4 from 10 (last digit). 10 - 4 = 6. You get Rs. 6 back!
Q8. You have Rs. 20 and spend Rs. 7. How much change do you get?Solution: Rs. 13
Reduce 2 to 1 (one less). Take 7 from 9 = 2, 7 from 10 = 3. Add 10 + 3 = 13. So, Rs. 20 - Rs. 7 = Rs. 13.
"Complete the Whole" (Using a Nearby Number)
Q9. 15 - 9 = ?
Solution: 6
9 is close to 10 (1 less). Take 10 from 15 = 5, then add 1 back. 5 + 1 = 6. So, 15 - 9 = 6.
Q10. 22 - 19 = ?
Solution: 3
19 is close to 20 (1 less). Take 20 from 22 = 2, then add 1 back. 2 + 1 = 3. So, 22 - 19 = 3.
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Worksheet Solution: Subtraction
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Number Splitting (Breaking Numbers Apart)
Q11. 36 - 14 = ?
Solution: 22
Split 36 into 30 and 6, and 14 into 10 and 4. Do 30 - 10 = 20, then 6 - 4 = 2. Add 20 + 2 = 22. So, 36 - 14 = 22.
Q12. 45 - 23 = ?
Solution: 22
Split 45 into 40 and 5, and 23 into 20 and 3. Do 40 - 20 = 20, then 5 - 3 = 2. Add 20 + 2 = 22. So, 45 - 23 = 22.
Left to Right Subtraction
Q13. 34 - 12 = ?
Solution: 22
Start from the left. 3 - 1 = 2 (tens), then 4 - 2 = 2 (ones). Put them together: 22. So, 34 - 12 = 22.
Q14. 67 - 45 = ?
Solution: 22
Left to right: 6 - 4 = 2 (tens), then 7 - 5 = 2 (ones). Together: 22. So, 67 - 45 = 22.
Bonus Fun Question!
Q15. You have 30 candies and give 18 to your friends. How many do you have left?
Solution: 12
Split 30 into 20 and 10, and 18 into 10 and 8. Do 20 - 10 = 10, then 10 - 8 = 2. Add 10 + 2 = 12. You have 12 candies left!
44 videos|10 docs|5 tests
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1. What is the concept of subtraction in mathematics? | ![]() |
2. How do you perform subtraction with large numbers? | ![]() |
3. What are some common mistakes made in subtraction? | ![]() |
4. Can subtraction be used in real-life scenarios? | ![]() |
5. What are the properties of subtraction? | ![]() |