lattice method

Download
Share  Add to  Flag Embed
Views:
 
Category: Education
     
 
License:   All Rights Reserved

Presentation Description

No description available.

Comments

Presentation Transcript

Skillsfor Working LifeMultiplication using lattice method : 

Skillsfor Working LifeMultiplication using lattice method

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

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

Slide 3: 

(Step 1) Multiply 301 x 1.2 3 0 1 1 2 Fill the numbers around the outside of the box

Slide 4: 

(Step 2 ) Multiply 301 x 1.2 3 0 1 1 2 0 1 0 2 0 0 0 0 0 3 0 6 Multiply the outside numbers and enter in the boxes

Slide 5: 

(Step 3 ) Multiply 301 x 1.2 3 0 1 1 2 0 1 0 2 0 0 0 0 0 3 0 6 2 1 6 3 We then add the diagonal numbers

Slide 6: 

(Step 4 ) Multiply 301 x 1.2 3 0 1 1 2 0 1 0 2 0 0 0 0 0 3 0 6 2 1 6 3 Now add the decimal point one place Answer = 361.2

Slide 7: 

Multiply 4.5 x 631 6 3 1 4 5 0 4 0 5 1 2 1 5 2 4 3 0 5 9 3 8 28395 Now add the decimal point one place Answer = 2839.5 2

Slide 8: 

Multiply 18.4 x 2.1 1 8 4 2 1 0 8 0 4 1 6 0 8 0 2 0 1 4 6 8 3 3864 Now add the decimal point two places Answer = 38.64

Slide 9: 

Multiply 960 x 0.42 9 6 0 4 2 0 0 0 0 2 4 1 2 3 6 1 8 0 2 3 0 40320 Now add the decimal point two places Answer = 403.20 4

Slide 10: 

Multiply 134 x 1.2 1 3 4 1 2 0 4 0 8 0 3 0 6 0 1 0 2 8 0 6 1 1608 Now add the decimal point one place Answer = 160.8

Slide 11: 

Multiply 13.4 x 1.2 1 3 4 1 2 0 4 0 8 0 3 0 6 0 1 0 2 8 0 6 1 1608 Now add the decimal point two places Answer = 16.08

Slide 12: 

Multiply 1.34 x 1.2 1 3 4 1 2 0 4 0 8 0 3 0 6 0 1 0 2 8 0 6 1 1608 Now add the decimal point three places Answer = 1.608

Slide 13: 

Jon bought 27 lengths of decking each 1.75m long What was their total length 1 7 5 2 7 1 0 3 5 1 4 4 9 0 2 0 7 5 2 7 4 4725 Now add the decimal point one place Answer = 47.25 m

Slide 14: 

Talia worked for 23 hours at a rate of £6.35 an hour. How much was the total earnings? 6 3 5 2 3 1 0 1 5 0 6 0 9 1 2 1 8 5 0 6 4 14605 Now add the decimal point two places Answer = £146.05 1

Slide 15: 

Gwen sells kites for £4.75 each. She sells 26 kites. How much does she get for the 26 kites? 4 7 5 2 6 1 0 3 0 1 4 4 2 0 8 2 4 0 5 3 2 12350 Now add the decimal point two places Answer = £123.50 1

Slide 16: 

A shop sells plants for 95p. Find the cost of 35 plants? 9 5 3 5 1 5 2 5 2 7 4 5 5 2 3 3 3325 Now add the decimal point two places Answer = £33.25 pence

Further exercises : 

Further exercises 1a. 257 x 57 b. 309 x 8.3 c. 573 x 0.48 d. 812 x 603 e. 912 x 56.3 14,649 2,564.7 275.04 489,636 51,345.6

Further exercises : 

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

Further exercises : 

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