The multiples of 9 are an infinite set that starts 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180, 189, 198, 207, 216, 225, 234, 243, 252, 261, 270, 279, 288, 297, 306, 315, 324, 333, 342, 351, 360, 369, 378, 387, 396, 405, 414, 423, 432, 441, 450, 459, 468, 477, 486, 495, 504, 513, 522, 531, 540, 549, 558, 567, 576, 585, 594, 603, 612, 621, 630, 639, 648, 657, 666, 675, 684, 693, 702, 711, 720, 729, 738, 747, 756, 765, 774, 783, 792, 801, 810, 819, 828, 837, 846, 855, 864, 873, 882, 891, 900, and so on.
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There are an infinite number of them.
The smallest few are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, and 99 .
They are members of the infinite set of numbers of the form 9*k where k is an integer.
At most n-1. However, it can be a lot fewer. For example, calculating A10 does not require 9 multiplications. A*A = A2 A2*A2 = A4 A4*A4 = A8 A8*A2 = A10 Only 4 multiplications were required.
using multiplication facts is that You just memorize the multiplications so, 6 x 9 = 54
3*29 = 87
1x16, 2x8, 4x4
Do the multiplications, then add the results.