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精选优质文档-倾情为你奉上20以内进位加法分式练习 8 +4= 7 + 6 = 6 + 8 = 7+ 7=9 +4= 6 + 6 = 7 + 8 = 9+ 7=8 +8= 7 + 4 = 5 + 8 = 4+ 7=8 +9= 9 + 3 = 8 + 3 = 7+ 5= 6 +5= 3 + 9 = 4 + 7 = 6+ 6=2 +9= 9 + 6 = 9 + 9 = 5+ 7=7 +8= 4 + 8 = 5 + 8 = 8+ 7=8 +8= 9 + 5 = 7 + 5 = 6+ 8=20以内退位减法分式练习17 - 6 = 12 - 8 = 20 - 6 =11 - 6 = 14 - 7 = 13 - 9 =15 - 8 = 18 - 9 = 16 - 7 =12 - 7 = 11 - 9 = 20 - 7 =13 - 8 = 15 - 7 = 11 - 7 =12 - 8 = 17 - 9 = 14 - 7 =专心-专注-专业