712−212 = _____.
512
612
412
14
Since all three are like fractions, we can directly add the numerator of the fractions: 712−212 =7−212=512
Find the product
(1) 4 ⊗5 3
(2) 5 ⊗7 8
(3) (4 ⊗11 3) ⊗11 7
(4) (5 ⊗12 2) ⊗12 6