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Lattice Method

Lattice Method. By Erin Christianson. The Boxes. 3. 4 9. Question: 34x9=? Answer: 306. 1. 3 6. 2. 3. 7. 0. 6. Each Lattice equation must have boxes. In this case for this equation it is a 2 by 1 box but if it was 56x23 it would be a 2 by 2 box.

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Lattice Method

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  1. Lattice Method By Erin Christianson

  2. The Boxes 3 4 9 Question: 34x9=? Answer: 306 1 3 6 2 3 7 0 6 Each Lattice equation must have boxes. In this case for this equation it is a 2 by 1 box but if it was 56x23 it would be a 2 by 2 box.

  3. Putting the Numbers in the Box • 5 • 7 • 2 3 • 0 6 3 2 1 When you put the numbers in the boxes put the tens in the top box and the ones in the smaller box. 1 3 5 8 4 4 2 O For each number you multiply the top number on the side by the two top numbers in the Top 2 boxes then repeat with the bottom number

  4. Adding the Numbers Up • 7 • 7 • 9 1 2 4 2 8 9 3 3 6 6 3 7 3 1 As shown in the example above, you add the numbers in a diagonal way then carry if needed and put the number in the ones place in the bottom space.

  5. Getting your Answer • 7 • 7 • 9 1 2 4 2 8 9 3 3 6 6 3 7 3 1 Answer: 3,713

  6. Please make sure to do each step when you solve a lattice problem or you might get the wrong answer. Also ask your teacher if you should make an Estimate first.

  7. If you need any more help watch this video… http://www.youtube.com/watch?v=gS6TfWUv97I&feature=edu&list=PL301908982CBFE20D

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