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We can multiply bigger numbers using an algorithm!
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Calculate 50 X 60
67X 53
Calculate 50 X 7
21 180 350
3,000
Calculate 3 X 60
Calculate 3 X 7
+Add the results 3,551
To find 67 x 53, decompose the numbers!
Think of 67 as 60 + 7
Think of 53 as 50 + 3.
Multiply each part of 67 by each part of 53.
Add the results
Always start here
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Calculate 40 x 80
82X 45
Calculate 40 x 2
10 400 80
3,200
Calculate 5 x 80
Calculate 5 x 2
+Add the results 3,690
Let’s try another one!
Always start here
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= 10 x 20
26X 18
= 10 x 6
48 160 60
200
= 8 x 20
= 8 x 6
+Add the results 468
Try this on your own!
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81X 53
Let’s try one more!
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