1) 13 ÷ 9 = 1.(1 + 3) = 1.444 ...2) 23 ÷ 9 = 2.(2 + 3) = 2.555 ...3) 35 ÷ 9 = 3.(3 + 5) = 3.888 ...4) 47 ÷ 9 = 4.(4 + 7) = 4.(11) → 4.(11 - 9) = 5.222 ...5) 63 ÷ 9 = 6.(6 + 3) = 6.(9) → 6.(9 - 9) = 7.0 = 7