Partitioning & Grid Method for Multiplying Large Numbers

23 x 6 = ? Partition: 20 x 6 and 3 x6 Answer: 120 + 18 = 136 Partitioning 23 x 6 = ? Partition: 20 x 6 and 3 x6 Answer: 120 + 18 = 136 Now try these… 16 x 3 48 x 9 124 x 8 388 x 7

LG: I can use the grid method Partition the numbers in your problem Use grid multiplication to record your answers Add all products to get your final answer. Now try these… 17 x 4 26 x 5 13 x 9 9 10 90 3 27

LG: I can use the grid method Partition the numbers Use grid multiplication to record your answers Add all products to get your final answer. Now try these… 14 x 16 67 x 12 284 x 23 365 x 21 48 x 88 40 8 80 3200 640 320 64

LG: I can use efficient written methods to multiply large numbers Estimate a rough answer to your multiplication problem. Use the grid method to partition the numbers and multiply each section. Show all working out. Use a calculator to check your answer.

LG: I can use efficient methods to multiply large numbers For every problem you must: estimate, use grid method, and calculate check 23 x 34 58 x 97 47 x 18 84 x 20 532 x 25 684 x 83 641 x 30 783 x 55 6428 x 7 9317 x 3 7593 x 6 3064 x 9 26 x 5379 63 x 8315 90 x 7301 47 x 3096 Choose at least one problem to complete from each column to solve. Now create and solve your own. We would love to see a total of 10 problems (including the ones you have chosen from above). Challenge yourself!

Worded Problems-Grid Method 1) An oil reserve has 893 barrels of crude oil. Each barrel holds 42 litres of crude oil. What is the total volume of crude oil in the reserve? 2) Mr Strobel produces paper bags for various uses. He received 37 orders for grocery bags in a week. Each order was for 750 bags. How many bags did My Strobel produce?

Worded Problems Make 3 different worded to problems to challenge each other