Subtraction
Ravi had 12 toffees. He ate 4 of them. How many toffees are left?
8 toffees are left, Hence 12 - 4 = 8
Example 1: Subtract 8 from 15
Step 1: Place the smaller number below the larger number.
Step 2: Draw vertical bars for the larger number.
Step 3: Cross 8 bars out of 15 bars. Now we are left with 7 bars.