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Published byRose Tucker Modified over 7 years ago

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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?

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

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87 5 1 First draw a box Write one number across the top Write one number down the side

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87 5 1 Split the box into 1 row and 1 column for each number Draw a diagonal line in each of the boxes

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87 5 1 8 x 5 = ? Multiply the two numbers that meet In each box

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87 5 1 0 4 7 x 5 = ? Write the answer in the box Put the tens in top half the units in the bottom

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87 5 1 4 0 8 x 1 = ? 3 5 Write the answer in the box Put the tens in top half the units in the bottom

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87 5 1 0 4 5 3 0 8 7 x 1 = ? Write the answer in the box Put the tens in top half the units in the bottom

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87 5 1 0 4 5 3 0 87 0 Write the answer in the box Put the tens in top half the units in the bottom

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87 5 1 0 4 5 3 0 87 0 We can ignore the numbers outside for now

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0 4 5 3 0 87 0 Add the numbers in the diagonal columns Remember to start at the right hand side 7 31 4 4 If the number is more than 10 carry into the next row

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87 5 1 0 4 5 3 0 87 0 87 x 51 = 4437 7 3 4 4 x

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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

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