1. FLOWERBEDS Here are four flowerbeds surrounded by slabs How many slabs would you need for 100 flowerbeds?

2. STRATEGY 1. Break the problem into smaller pieces 2. Tabulate results 3. Look for patterns and why they occur 4. Find a formula 5. Solve the problem

3. Break the problem into smaller pieces 1 Flowerbed has 6 slabs Draw the diagrams for 3 and 4 flowerbeds 2 Flowerbeds have 10 slabs

4. Tabulate results FlowerbedsSlabs 16 210 3 4 14 18

5. Look for patterns… FlowerbedsSlabs 16 210 3 4 14 18 +4 …and why they occur

6. 6+4+4+4+ 3 lots of 4

7. Find a formula FlowerbedsWorking outSlabs 16 + 0x46 26 + 1x410 36 + 2x414 46 + 3x418

8. FlowerbedsWorking outSlabs 16 + 0x46 26 + 1x410 36 + 2x414 5 10 n 6 + 4x4 6 + 9x4 6 + (n-1)x4 22 42 6+4(n-1)

9. Solve the problem 100 flowerbeds? 6 + 99 x 4 = 402402