Read the number given in the first row and draw the same number of lines across to represent the number value. Read the number given in the second row of the box and strike this number of lines from the total lines. Count the remaining number of lines and write this number value in the third row.
On the sheet
The sheet contains six subtraction boxes: 5 - 1, 7 - 1, 10 - 1, 8 - 1, 15 - 1, and 11 - 1. Children draw vertical lines, strike out one line, and write the remaining count.