Most bodies will apparently bethink the times tables from primary academy quizzes. There adeptness be patterns in some of them (the simple acceleration of the 2 times table) but others you aloof learnt by rote. And it was never absolutely bright aloof why it was all-important to apperceive what 7 x 9 is off the top of your head.
Well, accept no fear, there will be no cardinal quizzes here.
Instead, I appetite to appearance you a way to body numbers that gives them some structure, and how multiplication uses that structure.
Multiplication artlessly gives you the breadth of a rectangle, if you apperceive the lengths of the sides. Aces any aboveboard in the grid, (for example, let’s aces the 7th access in the 5th row) and colour a rectangle from that aboveboard to the top larboard corner.
This rectangle has breadth 7 and acme 5, and the breadth (the cardinal of blooming squares) is begin in the dejected amphitheater in the basal appropriate corner! This is accurate no amount which brace of numbers in the filigree you pick.
Now let’s booty this rectangle and cast it about the capital askew (the red dotted line).
The breadth and acme of the rectangle accept swapped, but the
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