Keys Skills Multiplication using lattice method TUTOR VERSION

Outcomes from this session At the end of this session you should be able

(Step 1) Multiply 301 x 1. 2 3 0 1 1 2 Fill the

(Step 2 ) Multiply 301 x 1. 2 3 0 0 0 0 6

(Step 3 ) Multiply 301 x 1. 2 3 0 0 0 3 0

(Step 4 ) Multiply 301 x 1. 2 3 0 0 0 0 6

Jon bought 27 lengths of decking each 1. 75 m long What was their

Talia worked for 23 hours at a rate of £ 6. 35 an hour.

Gwen sells kites for £ 4. 75 each. She sells 26 kites. How much

A shop sells plants for 95 p. Find the cost of 35 plants? 9

Further exercises 1 a. 257 x 57 14, 649 b. 309 x 8. 3

Further exercises 2. A caterer charges £ 16 per head. How much is the

Further exercises 4. A school has 36 classes. Each class has 31 children. How

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Keys Skills Multiplication using lattice method TUTOR VERSION 1

Outcomes from this session At the end of this session you should be able to Understand how to multiply decimals using the lattice method Complete practical examples to verify learning 2

(Step 1) Multiply 301 x 1. 2 3 0 1 1 2 Fill the numbers around the outside of the box 3

(Step 2 ) Multiply 301 x 1. 2 3 0 0 0 0 6 1 1 0 0 2 1 2 Multiply the outside numbers and enter in the boxes 4

(Step 3 ) Multiply 301 x 1. 2 3 0 0 0 3 0 6 0 0 0 6 3 1 1 0 0 1 2 2 We then add the diagonal numbers 5

(Step 4 ) Multiply 301 x 1. 2 3 0 0 0 0 6 3 6 1 1 0 0 1 2 2 3612 Now add the decimal point one place 3613 Answer = 361. 2 6

Multiply 4. 5 x 631 6 3 2 1 4 2 3 3 0 2 1 0 8 1 4 0 5 9 5 4 5 5 28395 Now add the decimal point one place Answer = 2839. 5 7

Multiply 18. 4 x 2. 1 1 8 0 1 2 0 8 0 6 0 1 3 4 8 0 8 6 4 2 1 4 3864 Now add the decimal point two places Answer = 38. 64 8

Multiply 960 x 0. 42 9 6 3 4 2 6 1 3 0 4 1 8 0 0 2 2 0 40320 Now add the decimal point two places Answer = 403. 20 9

Multiply 134 x 1. 2 1 3 0 0 1 0 6 0 3 0 2 1 4 4 0 6 0 8 1 2 8 1608 Now add the decimal point one place Answer = 160. 8 10

Multiply 13. 4 x 1. 2 1 3 0 0 1 0 6 0 3 0 2 1 4 4 0 6 0 8 1 2 8 1608 Now add the decimal point two places Answer = 16. 08 11

Multiply 1. 34 x 1. 2 1 3 0 0 1 0 6 0 3 0 2 1 4 4 0 6 0 8 1 2 8 1608 Now add the decimal point three places Answer = 1. 608 12

Jon bought 27 lengths of decking each 1. 75 m long What was their total length 1 7 0 0 7 3 4 5 9 2 2 0 4 7 4 1 1 2 5 7 5 4725 Now add the decimal point one place Answer = 47. 25 m 13

Talia worked for 23 hours at a rate of £ 6. 35 an hour. How much was the total earnings? 6 3 5 1 1 2 1 6 1 0 5 9 0 2 0 6 8 4 1 0 3 5 14605 Now add the decimal point two places Answer = £ 146. 05 14

Gwen sells kites for £ 4. 75 each. She sells 26 kites. How much does she get for the 26 kites? 4 7 5 0 1 8 2 3 3 4 0 2 5 2 0 4 4 2 1 1 6 0 12350 Now add the decimal point two places Answer = £ 123. 50 15

A shop sells plants for 95 p. Find the cost of 35 plants? 9 5 1 2 5 7 2 4 5 5 3 3 2 3 5 5 3325 Now add the decimal point two places Answer = £ 33. 25 pence 16

Further exercises 1 a. 257 x 57 14, 649 b. 309 x 8. 3 2, 564. 7 c. 573 x 0. 48 275. 04 d. 812 x 603 489, 636 e. 912 x 56. 3 51, 345. 6 17

Further exercises 2. A caterer charges £ 16 per head. How much is the charge for 45 people? £ 720 3. There are 48 tins in each tray. How many are there in 35 trays? 1, 680 tins 18

Further exercises 4. A school has 36 classes. Each class has 31 children. How many children are there at the school? 1, 116 children 5. A concert hall has 85 rows of 48 seats. What is the total number of seats? 4, 080 seats 19