Grade 2 Subtraction: Subtraction Within 100

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   61 − 6 = ?

   1. Look at the ones place: 1 − 6
   2. 1 is less than 6, so we need to regroup (borrow).
   3. Borrow 1 ten from 6 tens, leaving 5 tens.
   4. 1 becomes 11 ones.
   5. Now subtract the ones: 11 − 6 = 5
   6. Subtract the tens: 5 − 0 = 5
   7. The answer is 55.

   Answer: 55

2. Example 2

   41 − 8 = ?

   1. Look at the ones place: 1 − 8
   2. 1 is less than 8, so we need to regroup (borrow).
   3. Borrow 1 ten from 4 tens, leaving 3 tens.
   4. 1 becomes 11 ones.
   5. Now subtract the ones: 11 − 8 = 3
   6. Subtract the tens: 3 − 0 = 3
   7. The answer is 33.

   Answer: 33

3. Example 3

   85 − 68 = ?

   1. Look at the ones place: 5 − 8
   2. 5 is less than 8, so we need to regroup (borrow).
   3. Borrow 1 ten from 8 tens, leaving 7 tens.
   4. 5 becomes 15 ones.
   5. Now subtract the ones: 15 − 8 = 7
   6. Subtract the tens: 7 − 6 = 1
   7. The answer is 17.

   Answer: 17