Not enough beads, complement of 4 is 1, add 1, take away 5, Answer 11
25 - 2 (25 minus 2)
45 - 11 (45 take away 11)
88 - 44 (88 subtract 44)
37 - 33 (37 minus 33)
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Abacus Lesson 19: Subtraction, Complements of 5, 10's column
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