一年级数学下册的退位减法口算题

14-5 = 18-9 = 11-2 = 12-3 = 13-4 = 15-6 = 16-7 =

14-5 = 18-9 = 11-2 = 12-3 = 13-4 = 15-6 = 16-7 =

18-1.18-2.18-4.18-5.18-6.12-5.19-

18-9 = 11-2 = 12-3 = 13-4 = 15-6 = 16-7 = 17-8同意0。