Multiplying a number by 11.
To multiply any 2-figure number by 11 we just put
the total of the two figures between the 2 figures.
26 x 11 = 286 Notice that the outer figures in 286 are the 26
being multiplied.
And the middle figure is just 2 and 6 added up.
So 72 x 11 = 792
77 x 11 = 847 This involves a carry figure because 7 + 7 = 14
we get 77 x 11 = 7147 = 847.
To multiply any 2-figure number by 11 we just put
the total of the two figures between the 2 figures.
26 x 11 = 286 Notice that the outer figures in 286 are the 26
being multiplied.
And the middle figure is just 2 and 6 added up.
So 72 x 11 = 792
77 x 11 = 847 This involves a carry figure because 7 + 7 = 14
we get 77 x 11 = 7147 = 847.
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