You have to pay £87 per week for your rent. You have to pay the rent for 51 weeks of the year.

1. You have to pay £87 per week for your rent. You have to pay the rent for 51 weeks of the year. How much will you pay over the year?

2. To work this out we need to: • Multiply 87 by 51 We can do this using ‘the lattice method’

3. 8 7 5 1 Write one number down the side Write one number across the top First draw a box

4. 8 7 5 1 Split the box into 1 row and 1 column for each number Draw a diagonal line in each of the boxes

5. 8 7 5 8 x 5 = ? 1 Multiply the two numbers that meet In each box

6. 8 7 4 5 0 7 x 5 = ? 1 Write the answer in the box Put the tens in top half the units in the bottom

7. 8 7 3 4 5 0 5 1 8 x 1 = ? Write the answer in the box Put the tens in top half the units in the bottom

8. 8 7 4 3 5 0 5 0 1 7 x 1 = ? 8 Write the answer in the box Put the tens in top half the units in the bottom

9. 8 7 4 3 5 0 5 0 0 1 8 7 Write the answer in the box Put the tens in top half the units in the bottom

10. 8 7 4 3 5 0 5 0 0 1 8 7 We can ignore the numbers outside for now

11. Add the numbers in the diagonal columns Remember to start at the right hand side 4 3 4 0 5 0 0 If the number is more than 10 carry into the next row 4 8 7 1 3 7

12. 8 7 x 4 3 5 4 0 5 0 0 1 4 8 7 3 7 87 x 51 = 4437

13. You have to pay £87 per week for your rent. You have to pay the rent for 51 weeks of the year. How much will you pay over the year? £4,437