10以内加减法自动出题(F9换题)19-1=8217-5=221+3=4229-3=636-1=5238+1=949-6=3249+1=1059-6=3251+3=461-1=0269-4=575-4=1275+4=981+4=52810-3=792+2=4292+2=4104+0=4301+6=7119-8=1314+1=5126-6=0327-5=2133+4=7339-1=8141+7=8343+1=4158-5=3359-9=0162-2=0364-1=31710-9=1376+3=9188-8=0382+3=51910-1=9399-7=2206+0=6406+2=8