1. **State the problem:** Peter has 4 boxes of markers. Each box starts with 8 markers, and he adds 1 more marker to each box. We need to complete the strip diagram showing the total markers. 2. **Understand the situation:** Each box initially has 8 markers. Since there are 4 boxes, the total starting markers are $4 \times 8$. 3. **Calculate the total starting markers:** $$4 \times 8 = 32$$ 4. **Add the new markers:** Peter adds 1 marker to each box, so total new markers added are: $$4 \times 1 = 4$$ 5. **Calculate the total markers after adding:** $$32 + 4 = 36$$ 6. **Complete the strip diagram:** - Starting number in Box 1: 8 - Starting number in Box 2: 8 - Starting number in Box 3: 8 - Starting number in Box 4: 8 - New Markers: 4 (1 added to each box) 7. **Summary:** The total markers are 36, composed of 32 starting markers and 4 new markers added. This completes the strip diagram based on the problem.