分数加减法口算练习
姓名完成时间成绩
(细心看清数字和符号,结果请用最简分数表示。)
+= -= -= -= -=
+ = -= += -= +=
-= -= -= + = -=
+= -= += 1-= +=
1-= += -= -= +=
+= += += -= -=
-= -= += -= +=
-= += -= += -=
+= —= -= -= - =
+= -= += 1-= +=
+= 1-= -= -= +=
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